Added first draft of login and tour select page

lib/bloc/tour_select/bloc.dart

@@ -0,0 +1,14 @@
+import 'package:app_gaslieferung/repository/tour_select_repository.dart';
+import 'package:bloc/bloc.dart';
+import 'event.dart';
+import 'state.dart';
+
+class TourSelectBloc extends Bloc<TourSelectEvent, TourSelectState> {
+  TourSelectRepository repository;
+
+  TourSelectBloc({required this.repository}) : super(TourSelectInitial()) {
+    on<TourSelectEvent>((event, emit) {
+      // TODO: handle event
+    });
+  }
+}