feat: Add mute notification action

lib/utils/notification_background_handler.dart

@@ -174,8 +174,10 @@ Future<void> notificationTap(
             parseCommands: false,
             displayPendingEvent: false,
           );
+        case FluffyChatNotificationActions.mute:
+          await room.setPushRuleState(PushRuleState.mentionsOnly);
       }
   }
 }
 
-enum FluffyChatNotificationActions { markAsRead, reply }
+enum FluffyChatNotificationActions { markAsRead, reply, mute }

lib/utils/push_helper.dart

@@ -272,6 +272,11 @@ Future<void> _tryPushHelper(
               l10n.markAsRead,
               semanticAction: SemanticAction.markAsRead,
             ),
+            AndroidNotificationAction(
+              FluffyChatNotificationActions.mute.name,
+              l10n.mute,
+              semanticAction: SemanticAction.mute,
+            ),
           ],
   );
   const iOSPlatformChannelSpecifics = DarwinNotificationDetails();