Critical fixes:
- Add config.json for proper LNbits registration
- Fix __init__.py with complete router and lifecycle setup
- Split views.py and views_api.py following LNbits pattern
- Add services.py for API business logic
- Add helpers.py for utility functions
- Add pyproject.toml with proper dependencies
- Add static files directory structure
- Export all required functions for LNbits discovery

This version should install correctly via LNbits extension manager.