- Added new localization strings for total, mean per title, completion rate, watching time, reading time, average chapters per title, read percentage, and entries in multiple languages.
- Enhanced the History model to include readingTimeSeconds.
- Updated AnimeStreamController and ReaderController to track reading time and save it to history.
- Implemented reading time tracking in Anime and Novel reader views.
- Introduced statistics calculations for total reading time across histories.
- Updated statistics screen to display total reading time and average reading time per title.
- new file item_type_filters.dart for the hiddenItemTypes function.
- reduces code duplication in statistics_screen, categories_screen and base_library_tab_screen
- Extract localizedItemType() from `base_library_tab_screen.dart`
- Add localizedSources() and localizedExtensions() for browse_screen.dart
- Reduce if-statements in statistics_screen.dart
- Reduce if-statements in categories_screen.dart
- Reduce if-statements in browse_screen.dart
