📚 docs: Comprehensive documentation and CI/CD enhancements

✨ Features:
- Added 3 new badges (Coverage 61.7%, Tests 23, Extensions 8/12)
- Added comprehensive Extensions section with 8 extension examples
- Added CI/CD & Automation documentation section
- Added extension performance metrics to benchmarks

🔧 CI/CD:
- Added extension benchmarks tracking
- Added test coverage generation (coverage.out + HTML)
- Added extension artifact uploads
- Added Python aggregation script for multi-platform results
- Fixed YAML syntax in benchmarks.yml

📊 Documentation:
- Created DOCUMENTATION_UPDATE_SUMMARY.md (350+ lines)
- Documented all changes with examples
- Added usage instructions and next steps

Co-authored-by: GitHub Copilot <noreply@github.com>

📦 Update beve

docs: refresh benchmarks for v1.3.0

docs: refresh benchmarks for v1.2.0