add serial queue

[aelam]

Pull Request Description

Summary

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🧹 Code cleanup/refactoring
• 🔧 Build/CI changes

Changes Made

Related Issues

Testing

• New tests added for new functionality
• All existing tests pass
• Manual testing completed

Screenshots/Recordings

Checklist

• Code follows the project's style guidelines
• Self-review of the code has been performed
• Code has been commented, particularly in hard-to-understand areas
• Corresponding documentation has been updated
• Changes generate no new warnings
• Any dependent changes have been merged and published

Additional Notes

[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 35.59%. Comparing base (fd26e4e) to head (5613e36).

Files with missing lines	Patch %	Lines
...PCConnection/StdioJSONRPCConnectionTransport.swift	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #124      +/-   ##
==========================================
- Coverage   35.61%   35.59%   -0.03%     
==========================================
  Files         143      143              
  Lines        5949     5953       +4     
==========================================
  Hits         2119     2119              
- Misses       3830     3834       +4     

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