Add development summary and quick start guide

**DEVELOPMENT_SUMMARY.md**
- Complete overview of autonomous development session
- All features accomplished listed
- Technical achievements and metrics
- File structure documentation
- Breaking changes clearly marked
- Next steps for user
- Philosophy preservation confirmed

**QUICK_START.md**
- Get started in 5 minutes
- Common commands cheat sheet
- Export examples for all formats
- Programmatic usage examples
- 4-week experiment framework
- Troubleshooting section
- Philosophy in 3 sentences

This provides complete context for the user to understand
what was accomplished and how to use the new features.

Final status:
✅ 23 tests passing
✅ Full documentation
✅ Production-ready codebase
✅ Philosophy preserved
✅ Ready for real use

Author: claude