* Remove custom-onnxruntime-arm64.aar
* Refactor remaining, hardcoded UI strings into localizable resources and added French and Russian to language list
* Fix background auto-advance for Text-to-Speech (TTS)
* Refactored the EPUB reader to use localized string resources instead of hardcoded strings across multiple components.
* Refactored the PDF viewer and annotation components to use centralized string resources instead of hardcoded text.
* Updated `strings.xml` with extensive translation hints and localization metadata.
* FolderSyncWorker: update supported file types in getFileType
* Extract hardcoded strings to `strings.xml` and `plurals.xml`
* Extract hardcoded strings to `strings.xml` and `plurals.xml`
* Extract hardcoded strings to `strings.xml` and `plurals.xml` in MainViewModel
* Extract hardcoded strings to `strings.xml` and `plurals.xml` in Common.kt
* Extract hardcoded strings to `strings.xml` and `plurals.xml` in Epub Reader
