Removed IntelliJ IDEA configuration files from the repository to avoid tracking editor-specific settings. Added .idea/ to .gitignore for future prevention.
- Introduce .gitignore to exclude output directory
- Add IntelliJ/PyCharm project files under .idea/
- Create CLAUDE.md for Claude Code guidance on the project
- Add scripts/nerdletter_numbers_station_final.sh as the refined Lincolnshire Poacher style generator
- Update sample output MP4 in output/