Release v1.1

Add metadata, seekbar UI and CI release

CI: Calculate VERSION_NAME/VERSION_CODE in workflow, grant contents: write, rename APK and create a GitHub Release (softprops/action-gh-release); pass version env to build. build.gradle.kts: read versionCode/versionName from environment.

App: MediaRepository: expose title, artist and duration LiveData and add updateMetadata(). MusicControllerService: extract title/artist/duration from metadata and push to repository. MainActivity: add SeekBar, smooth progress updater, drag/seek handling, time formatting and observers for title/artist/duration/playback state. Layout: rework to a two-column layout with guideline, album art left and controls right, add seekbar, time labels and media buttons. Add vector drawables for play/pause/next/previous.