Add DataStorageScreen for managing media cache and storage:
- Display cache statistics (image/video/audio counts and sizes)
- Show AsyncStorage usage information
- Add clear all cache functionality
- Add cleanup expired cache option (7 days threshold)
- Add storage usage breakdown by category
- Add "Last cleaned" timestamp display
Also fix MediaCacheManager to skip native cache operations on web platform:
- Return original URI directly on web without caching
- Skip directory creation on web
- Skip file existence checks on web
- Skip startup and periodic cleanup on web
- Add pagination infrastructure with usePagination and usePaginationManager hooks
- Add connection state management hook for network status tracking
- Add media caching infrastructure with useMediaCache hook
- Add differential message synchronization infrastructure
- Export new hooks from central index file
- Remove backup file MainNavigator.tsx.bak
