feat(useragent): initial impl

useragent/lib/home.dart

@@ -0,0 +1,24 @@
+import 'package:arbiter/features/adaptive_switcher.dart';
+import 'package:arbiter/screens/about.dart';
+import 'package:arbiter/screens/calc.dart';
+import 'package:flutter/material.dart';
+
+final _destinations = [
+  Destination(
+    label: "About",
+    icon: Icon(Icons.info_outline),
+    main: AdaptiveBuilders(build: (_) => About()),
+  ),
+  Destination(
+    label: "Calc",
+    icon: Icon(Icons.calculate),
+    main: AdaptiveBuilders(build: (_) => CalcScreen()),
+  ),
+];
+
+class Home extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return HomeRouter(destinations: _destinations);
+  }
+}