Initial (redacted) commit.

app/lib/infrastructure/routing.dart

@@ -0,0 +1,57 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+import 'package:habitrack_app/infrastructure/bottom_navigation.dart';
+import 'package:habitrack_app/pages/dashboard_page.dart';
+import 'package:habitrack_app/pages/widget_page.dart';
+
+// navigators, root and each destination of bottom navigation bar
+final _rootNavigatorKey = GlobalKey<NavigatorState>();
+
+final _shellNavigatorWidgetWallKey =
+    GlobalKey<NavigatorState>(debugLabel: 'widgetWall');
+
+final _shellNavigatorDashboardKey =
+    GlobalKey<NavigatorState>(debugLabel: 'dashboard');
+
+const String _widgetWallPath = '/widgetWall';
+const String _dashboardPath = '/dashboard';
+
+final goRouter = GoRouter(
+  initialLocation: _widgetWallPath,
+  navigatorKey: _rootNavigatorKey,
+  debugLogDiagnostics: true,
+  routes: [
+    StatefulShellRoute.indexedStack(
+      builder: (context, state, navigationShell) {
+        return ScaffoldWithBottomNavigationBar(
+          navigationShell: navigationShell,
+        );
+      },
+      branches: [
+        StatefulShellBranch(
+          navigatorKey: _shellNavigatorWidgetWallKey,
+          routes: [
+            GoRoute(
+              path: _widgetWallPath,
+              pageBuilder: (context, state) => const NoTransitionPage(
+                child: WidgetPage(),
+              ),
+            ),
+          ],
+        ),
+        StatefulShellBranch(
+          navigatorKey: _shellNavigatorDashboardKey,
+          routes: [
+            GoRoute(
+              path: _dashboardPath,
+              pageBuilder: (context, state) => const NoTransitionPage(
+                child: DashboardPage(),
+              ),
+            ),
+          ],
+        ),
+      ],
+    ),
+  ],
+);