Added basic Text sending

lib/api/marianumcloud/talk/sendMessage/sendMessage.dart

@@ -0,0 +1,25 @@
+import 'package:http/http.dart' as http;
+import 'package:http/src/response.dart';
+import 'package:marianum_mobile/api/marianumcloud/talk/sendMessage/sendMessageParams.dart';
+import 'package:marianum_mobile/api/marianumcloud/talk/talkApi.dart';
+
+import '../../../apiParams.dart';
+
+class SendMessage extends TalkApi {
+  String chatToken;
+  SendMessage(this.chatToken, SendMessageParams params) : super("v1/chat/$chatToken", params);
+
+  @override
+  assemble(String raw) {
+
+  }
+
+  @override
+  Future<Response>? request(Uri uri, ApiParams? body, Map<String, String>? headers) {
+    if(body is SendMessageParams) {
+      return http.post(uri, headers: headers, body: body.toJson());
+    }
+    return null;
+  }
+  
+}