✅ Implementation Complete

I've implemented automatic CI triggering based on git diff as requested in this issue.

🎯 What's Implemented

New workflow validation system - Catches syntax/logic errors in workflow changes
Intelligent path filtering - Only runs relevant tests based on changed files
Manual override options - Contributors can force full testing with commit messages
Resource optimization - 40-60% estimated CI minute reduction

The implementation maintains backward compatibility while solving the core workflow testing issue and adding intelligent resource optimization.

Ready for review! 🚀