- Complete rewrite as standalone Python executable
- Add multiple train types (Classic, D51, C51)
- Implement flying mode, accident mode, and speed control
- Remove external dependencies (now pure Python with ANSI codes)
- Add professional documentation (README, CONTRIBUTING, CHANGELOG)
- Update author information to Reverend Steven Milanese
- Add installation via Makefile
- Clean up virtual environments and old files
- Enhance README with badges, platform instructions, and links
This transforms sl into a production-ready command-line tool following
software engineering best practices while maintaining its core purpose
as a fun terminal animation.
