test: adding test coverage for nurbs, design, and geometry commands

[syscordan]

…designer\geometry_commands

Description

adding test coverage for shapes\surfaces\nurbs, designer\design, and designer\geometry_commands

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate unit tests.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have added the minimum version decorator to any new backend method implemented.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: extrude circle to cylinder)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.23%. Comparing base (4b76c44) to head (a312995).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2260      +/-   ##
==========================================
+ Coverage   94.48%   95.23%   +0.74%     
==========================================
  Files         169      169              
  Lines       11175    11175              
==========================================
+ Hits        10559    10642      +83     
+ Misses        616      533      -83     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.