- Add library_types table with ebooks, comics, manga types
- Add libraries table for multiple library support
- Add library_folders table for multi-folder libraries
- Add library_visibility table for user access control
- Add media_items table replacing ebooks for broader media support
- Create backward compatibility views for existing API
- Implement library service with type validation and file extension handling
- Support modular extension for future media types
Manga type includes cbz/cbr archives as requested