feat: Add audio playback system with Media3 and comprehensive audio content classification

- Add Media3 dependencies (ExoPlayer, HLS, MediaSession, UI) for audio streaming
- Implement AudioPlayerService as MediaSessionService with foreground playback support
- Create AudioHandler for playback control and AudioMedia domain model with AudioContentType enum
- Add MiniPlayerBar and FullPlayerSheet UI components with play/pause, seek, and navigation controls
- Implement AudioClassifier with strict priority

app/src/main/java/com/shaarit/presentation/nav/NavGraph.kt

@@ -58,7 +58,8 @@ fun AppNavGraph(
     shareDescription: String? = null,
     shareTags: List<String>? = null,
     isFileShare: Boolean = false,
-    initialDeepLink: String? = null
+    initialDeepLink: String? = null,
+    onPlayAudio: ((com.shaarit.domain.model.ShaarliLink) -> Unit)? = null
 ) {
     val navController = rememberNavController()
     val context = LocalContext.current
@@ -161,6 +162,7 @@ fun AppNavGraph(
                     navController.navigate(Screen.Reader.createRoute(linkId))
                 },
                 onNavigateToReminders = { navController.navigate(Screen.Reminders.route) },
+                onPlayAudio = onPlayAudio,
                 initialTagFilter = tag,
                 initialCollectionId = collectionId
             )