Created project base structure, state management, router and login

lib/models/app_status.dart

@@ -0,0 +1,12 @@
+import 'package:my_linkding/models/server_instance.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class AppStatus {
+  AppStatus();
+
+  AppStatus copyWith({
+    SharedPreferences? sharedPreferences,
+    ServerInstance? serverInstance,
+  }) =>
+      AppStatus();
+}