Handle underscore splitting in TestTree

[rogeralsing]

Summary

• split the final test-name segment on underscores to build deeper nodes
• add tests covering underscore separators and path lookup
• document TestTree splitting behavior in memory

Testing

• dotnet test tests/Asynkron.TestRunner.Tests

Fixes #11
Related to #10

[rogeralsing]

Progress update:

• Updated TestTree to split final name segment on underscores for deeper nodes.
• Added tests for underscore splitting and FindNodeByPath lookup.
• Added memory note about TestTree splitting behavior.
• Ran Determining projects to restore...
  All projects are up-to-date for restore.
  Asynkron.TestRunner.Protocol -> /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner.Protocol/bin/Debug/net10.0/Asynkron.TestRunner.Protocol.dll
  /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner.Worker/NUnitFramework.cs(100,13): warning CA1305: The behavior of 'StringBuilder.Append(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'NUnitFramework.BuildFilter(IEnumerable)' with a call to 'StringBuilder.Append(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) [/Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner.Worker/Asynkron.TestRunner.Worker.csproj]
  /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner.Worker/NUnitFramework.cs(107,17): warning CA1305: The behavior of 'StringBuilder.Append(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'NUnitFramework.BuildFilter(IEnumerable)' with a call to 'StringBuilder.Append(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) [/Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner.Worker/Asynkron.TestRunner.Worker.csproj]
  Asynkron.TestRunner.Worker -> /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner.Worker/bin/Debug/net10.0/testrunner-worker.dll
  /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/GitHubIssueReporter.cs(432,9): warning CA1305: The behavior of 'StringBuilder.AppendLine(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'GitHubIssueReporter.BuildIssueBody(GitHubIssueReporter.TestIssueInfo)' with a call to 'StringBuilder.AppendLine(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) [/Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/Asynkron.TestRunner.csproj]
  /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/GitHubIssueReporter.cs(434,9): warning CA1305: The behavior of 'StringBuilder.AppendLine(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'GitHubIssueReporter.BuildIssueBody(GitHubIssueReporter.TestIssueInfo)' with a call to 'StringBuilder.AppendLine(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) [/Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/Asynkron.TestRunner.csproj]
  /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/GitHubIssueReporter.cs(435,9): warning CA1305: The behavior of 'StringBuilder.AppendLine(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'GitHubIssueReporter.BuildIssueBody(GitHubIssueReporter.TestIssueInfo)' with a call to 'StringBuilder.AppendLine(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) [/Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/Asynkron.TestRunner.csproj]
  /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/GitHubIssueReporter.cs(521,17): warning CA1305: The behavior of 'StringBuilder.AppendLine(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'GitHubIssueReporter.BuildIssueBody(GitHubIssueReporter.TestIssueInfo)' with a call to 'StringBuilder.AppendLine(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) [/Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/Asynkron.TestRunner.csproj]
  /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/GitHubIssueReporter.cs(525,17): warning CA1305: The behavior of 'StringBuilder.AppendLine(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'GitHubIssueReporter.BuildIssueBody(GitHubIssueReporter.TestIssueInfo)' with a call to 'StringBuilder.AppendLine(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) [/Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/Asynkron.TestRunner.csproj]
  /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/GitHubIssueReporter.cs(531,9): warning CA1305: The behavior of 'StringBuilder.AppendLine(ref StringBuilder.AppendInterpolatedStringHandler)' could vary based on the current user's locale settings. Replace this call in 'GitHubIssueReporter.BuildIssueBody(GitHubIssueReporter.TestIssueInfo)' with a call to 'StringBuilder.AppendLine(IFormatProvider, ref StringBuilder.AppendInterpolatedStringHandler)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1305) [/Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/Asynkron.TestRunner.csproj]
  Asynkron.TestRunner -> /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/src/Asynkron.TestRunner/bin/Debug/net10.0/Asynkron.TestRunner.dll
  /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/tests/Asynkron.TestRunner.SampleXunit/ModuleInit.cs(7,6): warning CA2255: The 'ModuleInitializer' attribute is only intended to be used in application code or advanced source generator scenarios (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2255) [/Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/tests/Asynkron.TestRunner.SampleXunit/Asynkron.TestRunner.SampleXunit.csproj]
  Asynkron.TestRunner.SampleXunit -> /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/tests/Asynkron.TestRunner.SampleXunit/bin/Debug/net10.0/Asynkron.TestRunner.SampleXunit.dll
  Asynkron.TestRunner.Tests -> /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/tests/Asynkron.TestRunner.Tests/bin/Debug/net10.0/Asynkron.TestRunner.Tests.dll
  Test run for /Users/rogerjohansson/git/asynkron/Asynkron.TestRunner/.worktrees/Fix-failing-test-AddTests-underscore-splitting-https-github-com-Asynkron-asynkron-testrunner-issues-11-/tests/Asynkron.TestRunner.Tests/bin/Debug/net10.0/Asynkron.TestRunner.Tests.dll (.NETCoreApp,Version=v10.0)
  VSTest version 18.0.1 (arm64)

Starting test execution, please wait...
A total of 1 test files matched the specified pattern.

Passed! - Failed: 0, Passed: 59, Skipped: 0, Total: 59, Duration: 166 ms - Asynkron.TestRunner.Tests.dll (net10.0) (pass; existing CA1305/CA2255 warnings only).