implemented new loadable state concept

lib/state/app/modules/marianumMessage/dataProvider/marianum_message_get_messages.dart

@@ -0,0 +1,6 @@
+import '../../../infrastructure/dataLoader/data_loader.dart';
+
+class MarianumMessageGetMessages extends DataLoader {
+  @override
+  Future fetch() => Future(() => 'Test');
+}