feat (tabby-common): Add Scala Language Support with Tree-Sitter Parsing

[roman0yurin]

This PR introduces syntax support for the Scala language. It expands the stop word list specifically for Scala and integrates syntax tree parsing via Tree-Sitter. These changes improve code analysis and facilitate more accurate completions when working with Scala source files.

Changes:
• Added Scala-specific stop words.
• Integrated Tree-Sitter to parse Scala syntax trees.
• Updated configuration to handle Scala language nuances.

Testing:
Tested against a range of small Scala code examples to ensure robust parsing and better code insights. No regressions detected.

Thank you for reviewing this contribution!

[wsxiaoys]

Thanks for the PR! Overall LGTM.

Please also update https://tabby.tabbyml.com/docs/references/programming-languages/ in this PR

[roman0yurin]

Thank you so much for the feedback! I’ve now updated the page to note that Scala is supported. Since I already added the stop words and syntax in a previous commit, there weren’t any other changes necessary. Please let me know if there’s anything else I can clarify or improve. I appreciate your help and look forward to continuing our collaboration on Tabby!