added functionality to show own votes in polls

lib/api/marianumcloud/talk/getPoll/getPollState.dart

@@ -0,0 +1,22 @@
+import 'dart:convert';
+import 'dart:developer';
+
+import 'package:http/http.dart' as http;
+
+import '../talkApi.dart';
+import 'getPollStateResponse.dart';
+
+class GetPollState extends TalkApi<GetPollStateResponse> {
+  String token;
+  int pollId;
+  GetPollState({required this.token, required this.pollId}) : super('v1/poll/$token/$pollId', null);
+
+  @override
+  GetPollStateResponse assemble(String raw) {
+    log(raw);
+    return GetPollStateResponse.fromJson(jsonDecode(raw)['ocs']);
+  }
+
+  @override
+  Future<http.Response> request(Uri uri, Object? body, Map<String, String>? headers) => http.get(uri, headers: headers);
+}