Introduce a new custom theme feature that allows users to personalize the application background color using RGB sliders, hex input, or a set of predefined palettes.
Key changes include:
* **Custom Theme Engine**: Added `CustomThemeFragment` and `ThemeHelper` to manage color selection and application. The UI dynamically updates the background color across the `MainActivity` and `PlayerFragment` when preferences change.
* **Android TV Support**: Provided a specialized layout for television devices (`fragment_custom_theme.xml` in `layout-television`) with optimized focus handling for D-pad navigation.
* **Share Feature**: Implemented a "Share App" preference in `SettingsFragment` that triggers a standard Android share intent and displays a thank-you notification upon use.
* **Localization**: Added Ukrainian language support and updated string resources for multiple locales (DE, DA, EL, FR, JA, NL, PL, RU) to include the new theme and share options.
* **Persistence**: Updated `PreferencesHelper` and `Keys` to store theme-related settings, including the enabled state, selected color, and predefined color index.
Add explicit `POST_NOTIFICATIONS` permission checks in `SettingsFragment` and `PlayerFragment` before triggering notifications or showing related preferences.
Update the permission launcher in `MainActivity` to provide a "Settings" action that links to the system application details when the notification permission is permanently denied.
Improve UI and system integration by:
* Adjusting `Snackbar` positioning with bottom margins in `MainActivity` and `PlayerFragment`.
* Updating `NotificationSys` to use a new channel ID with `IMPORTANCE_LOW`.
* Configuring `MainActivity` in `activity_main.xml` to handle orientation and screen size configuration changes manually.
- Enable edge-to-edge display in `MainActivity` and handle window insets in `PlayerFragment`.
- Add a fade-out animation when hiding the loading overlay.
- Sync player state with the controller during setup and reset playing state in preferences on service destruction.
- Simplify splash screen drawable and update background color attributes in layout.
- Remove manual navigation bar color overrides.
* 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.