feat: batch processing for recommendations & sort by relevancy

[timschneeb]

Adds batch processing to the new recommendation screens and fixes some bugs.
It allows users to find common recommendations between multiple entries in their library.

• Users can multi-select entries from the library and collect recommendations for them
• For each recommendation source, duplicate recommendations are grouped and then sorted descending by their occurrence count; the count is displayed as a badge on the BrowseRecommendsScreen
• Users can choose to hide mangas that are already in their library. It uses the SmartSearchEngine (and trackers, sources) to determine whether a recommendation is already in the library

Images

Screen_Recording_20250127_001701_TachiyomiSY.mp4