Created project base structure, state management, router and login

lib/router/paths.dart

@@ -0,0 +1,6 @@
+class RoutesPaths {
+  static const connect = "/connect";
+  static const links = "/links";
+  static const search = "/search";
+  static const settings = "/settings";
+}

lib/router/routes.dart

@@ -0,0 +1,59 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+import 'package:my_linkding/screens/connect/ui/connect.dart';
+import 'package:my_linkding/screens/links/ui/links.dart';
+import 'package:my_linkding/screens/search/ui/search.dart';
+import 'package:my_linkding/screens/settings/ui/settings.dart';
+import 'package:my_linkding/widgets/layout.dart';
+
+import 'package:my_linkding/router/paths.dart';
+
+final rootNavigatorKey = GlobalKey<NavigatorState>();
+final linksNavigatorKey = GlobalKey<NavigatorState>();
+final searchNavigatorKey = GlobalKey<NavigatorState>();
+final settingsNavigatorKey = GlobalKey<NavigatorState>();
+
+final List<RouteBase> appRoutes = [
+  GoRoute(
+    path: RoutesPaths.connect,
+    builder: (context, state) => const Connect(),
+  ),
+  StatefulShellRoute.indexedStack(
+    builder: (context, state, navigationShell) => Layout(
+      navigationShell: navigationShell,
+    ),
+    branches: [
+      StatefulShellBranch(
+        navigatorKey: linksNavigatorKey,
+        initialLocation: RoutesPaths.links,
+        routes: [
+          GoRoute(
+            path: RoutesPaths.links,
+            builder: (context, state) => const Links(),
+          ),
+        ],
+      ),
+      StatefulShellBranch(
+        navigatorKey: searchNavigatorKey,
+        initialLocation: RoutesPaths.search,
+        routes: [
+          GoRoute(
+            path: RoutesPaths.search,
+            builder: (context, state) => const Search(),
+          ),
+        ],
+      ),
+      StatefulShellBranch(
+        navigatorKey: settingsNavigatorKey,
+        initialLocation: RoutesPaths.settings,
+        routes: [
+          GoRoute(
+            path: RoutesPaths.settings,
+            builder: (context, state) => const Settings(),
+          ),
+        ],
+      ),
+    ],
+  ),
+];