Added functionality to create chat

lib/api/marianumcloud/talk/createRoom/createRoomParams.dart

@@ -0,0 +1,27 @@
+import 'package:json_annotation/json_annotation.dart';
+
+import '../../../apiParams.dart';
+
+part 'createRoomParams.g.dart';
+
+@JsonSerializable()
+class CreateRoomParams extends ApiParams {
+  int roomType;
+  String invite;
+  String? source;
+  String? roomName;
+  String? objectType;
+  String? objectId;
+
+  CreateRoomParams({
+    required this.roomType,
+    required this.invite,
+    this.source,
+    this.roomName,
+    this.objectType,
+    this.objectId
+  });
+
+  factory CreateRoomParams.fromJson(Map<String, dynamic> json) => _$CreateRoomParamsFromJson(json);
+  Map<String, dynamic> toJson() => _$CreateRoomParamsToJson(this);
+}