Simple NavigationBar and placeholder map view

lib/pages/map_page.dart

@@ -0,0 +1,11 @@
+import 'package:flutter/material.dart';
+
+class MapPage extends StatelessWidget {
+  const MapPage({super.key});
+  static const routeName = '/map';
+
+  @override
+  Widget build(BuildContext context) {
+    return const Placeholder();
+  }
+}