Move debugging documentation to notes/ directory

Consolidates debugging notes, reports, and fix documentation:

From demos/01-eliza/:
- FIXES.md, BUG_SUMMARY.md, DEBUGGING_REPORT.md, FINAL_FIX_SUMMARY.md
- CONVERSATION_EXAMPLES.md, QUICK_FIX_GUIDE.md, TEST_OUTPUT.txt

From demos/03-embeddings/:
- FIXES.md

From demos/15-chatbot-evolution/:
- ALICE_*.md (8 files) - Alice debugging and integration reports
- PARRY_*.md (4 files) - Parry debugging and fix reports
- BUG_REPORT.md, BUGS_FOUND.md, TEST_RESULTS.md, FINAL_TEST_REPORT.md
- CONVERSATION_EXAMPLES.md

From demos/:
- COMPREHENSIVE_DEMO_TESTING_REPORT.md
- DEMOS_*_BUG_REPORT.md (3 files)
- GITHUB_ISSUES_TO_CREATE.md, ELIZA_VERIFICATION_REPORT.md

All files renamed with consistent demo prefix (e.g., demo15-alice-*).

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

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: jeremymanning