Created project base structure, state management, router and login

lib/providers/router_provider.dart

@@ -0,0 +1,23 @@
+import 'package:go_router/go_router.dart';
+import 'package:my_linkding/providers/api_client_provider.dart';
+import 'package:my_linkding/router/paths.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+import 'package:my_linkding/router/routes.dart';
+
+part 'router_provider.g.dart';
+
+@Riverpod(keepAlive: true)
+GoRouter router(RouterRef ref) {
+  return GoRouter(
+    redirect: (context, state) {
+      if (ref.watch(apiClientProviderProvider) == null) {
+        return RoutesPaths.connect;
+      }
+      return null;
+    },
+    initialLocation: RoutesPaths.links,
+    routes: appRoutes,
+    navigatorKey: rootNavigatorKey,
+  );
+}