Added timeout in case the JNI Isolate crashes and adds a dispose method to be kill the JNI Isolate

lib/aniyomi_bridge.dart

@@ -281,7 +281,10 @@ class AniyomiBridge {
     final completer = Completer<T>();
     _pendingRequests[message.id] = completer;
     _jniSenderPort.send(message);
-    return completer.future;
+    return completer.future.timeout(
+        const Duration(seconds: 20),
+        onTimeout: () => throw TimeoutException("JNI Isolate timed out")
+    );
   }
 
   String _getDylibDir(Directory supportDirectory) {

lib/jni_isolate.dart

@@ -190,6 +190,10 @@ class JniIsolate {
     }
   }
 
+  dispose() {
+    _jvmIsolate.kill(priority: Isolate.immediate);
+  }
+
   List<JSAnime> _getAnimeSearchResults(JAniyomiBridge jAniyomiBridge, String query, int page, String source) {
     JList<JObject?>? searchResults = jAniyomiBridge.getAnimeSearchResults(
       JString.fromString(query),