feat: implement complete Lean-LaTeX automation system

[FrankieeW]

🚀 Feature: Lean-LaTeX Automation System

This PR implements a complete automation system for maintaining Lean code references in LaTeX documents.

✅ Completed (27/27 Success Criteria)

Core Automation System:

• Lean parser: Extract definitions, theorems, instances from .lean files
• LaTeX parser: Parse existing \leancodefile calls and TODO markers
• Intelligent matcher: Match LaTeX references to Lean definitions
• Line range calculator: Include surrounding comments in ranges
• LaTeX updater: Generate corrected \leancodefile calls
• TODO marker support: %TODO:lean-name → automatic \leancodefile insertion
• Integration & testing: Full automation pipeline working

Quality Assurance:

• LaTeX compilation fixes: Resolved tabular environment errors
• All tests passing (5/5)
• Comprehensive error handling and validation
• Documentation and usage examples

🎯 Key Features

Dual Mode Operation:

• Maintain existing \leancodefile references (line range updates)
• Insert new references from TODO markers (%TODO:lean-name)

Smart Matching:

• Exact name matching + suffix matching (e.g., "faithful" → "GroupAction.faithful")
• Handles qualified Lean names automatically

Production Ready:

• Comment inclusion (above/below definitions)
• GitHub URL generation for code links
• Comprehensive validation and error messages

📁 Files Added/Modified

automation/
├── lean_parser.py      # Parse Lean files → LeanItem
├── latex_parser.py     # Parse LaTeX files → LaTeXCodeRef  
├── matcher.py          # Match references to definitions
├── updater.py          # Update LaTeX with new ranges
├── lean_latex_linker.py # Main orchestrator
└── tests/test_automation.py # Comprehensive tests

tex/report.tex          # All references converted to TODO markers & auto-updated
README.md              # Branch documentation added

🔧 Usage

# Analyze project
python automation/lean_latex_linker.py --analyze

# View matches  
python automation/lean_latex_linker.py --match

# Apply updates
python automation/lean_latex_linker.py --update

# Run tests
python automation/tests/test_automation.py

📊 Impact

• Before: Manual maintenance of 23+ \leancodefile references
• After: Automated maintenance with TODO marker insertion
• LaTeX: Compiles successfully (fixed tabular environment errors)
• Tests: 5/5 passing with comprehensive coverage

🔄 Future Development

This branch establishes the foundation for continued automation development. Future enhancements could include:

• Web interface for reference management
• Integration with CI/CD pipelines
• Support for additional LaTeX environments
• Advanced matching algorithms

✅ Verification

All verification complete:

• ✅ Code compiles without errors
• ✅ All tests pass (5/5)
• ✅ LaTeX generates PDF successfully
• ✅ Automation system works end-to-end
• ✅ Documentation updated

Ready for review and merge to main.