Added reaction overview with list of names who reacted

lib/api/marianumcloud/talk/getReactions/getReactions.dart

@@ -0,0 +1,27 @@
+import 'dart:convert';
+import 'dart:developer';
+
+import 'package:http/http.dart' as http;
+import 'package:http/http.dart';
+
+import '../../../apiParams.dart';
+import '../talkApi.dart';
+import 'getReactionsResponse.dart';
+
+class GetReactions extends TalkApi<GetReactionsResponse> {
+  String chatToken;
+  int messageId;
+  GetReactions({required this.chatToken, required this.messageId}) : super("v1/reaction/$chatToken/$messageId", null);
+
+  @override
+  assemble(String raw) {
+    log(raw);
+    return GetReactionsResponse.fromJson(jsonDecode(raw)['ocs']);
+  }
+
+  @override
+  Future<Response>? request(Uri uri, ApiParams? body, Map<String, String>? headers) {
+    return http.get(uri, headers: headers);
+  }
+
+}