chore: Clean up repository - remove test files and build artifacts

### Removed
- Test PDF files (TALEND_TEST_v*.pdf, test_*.pdf) - ~7MB of test artifacts
- Test markdown files (test_*.md, TEST_DOCUMENT.md)
- Build artifacts (dist/, *.egg-info/, build/)
- Temporary documentation (SUMMARY.txt, notes/)

### Updated
- Enhanced .gitignore to prevent future clutter
  - Added TEST_*.md pattern
  - Added TALEND_TEST_*.pdf pattern
  - Added *.tmp for temporary files
  - Added SUMMARY.txt

### Impact
- Repository is now cleaner and more maintainable
- Reduced repository size by removing unnecessary test files
- Better gitignore patterns prevent accidental commits of test/temp files

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: claude

.gitignore

@@ -56,6 +56,12 @@ tmp/
 # Test files (don't publish)
 test_*.md
 test_*.py
+TEST_*.md
+TALEND_TEST_*.pdf
+
+# Temporary files
+SUMMARY.txt
+*.tmp
 
 # OS
 .DS_Store