feat(proj): init

mobile/widgetbook/test/widget_test.dart

@@ -0,0 +1,10 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:please_pay_me_widgetbook/app.dart';
+
+void main() {
+  testWidgets('WidgetbookRoot builds', (WidgetTester tester) async {
+    await tester.pumpWidget(const WidgetbookRoot());
+    await tester.pump();
+    expect(find.byType(WidgetbookRoot), findsOneWidget);
+  });
+}