* Implement initial Android TV support, including `LEANBACK_LAUNCHER` intent filter, hardware feature declarations, and television-specific layouts for the player, search results, and dialogs.
* Add a splash/loading screen for the TV interface and a dedicated `SplashTheme`.
* Improve DPAD navigation by adding `OnKeyListener` for station cards and allowing focus on internal elements.
* Update `LayoutHolder` and `PlayerFragment` to handle TV layouts and add previous/next station navigation buttons.
* Adjust `PreferencesHelper` to disable station editing by default on TV devices.
* Update `androidx.media3` to v1.10.0, `work-runtime-ktx` to v2.11.2, and add `androidx.leanback` dependency.
* Bump `versionCode` to 144 and `versionName` to 14.4.
* Refactor `PlayerService` to simplify sleep timer cancellation logic.
* Remove stale copyright headers and license comments from several Kotlin files.
Michatec
Michachatz