Add app source and tests

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

lib/Peach/see/server/setup/ServerSetup.dart

@@ -0,0 +1,15 @@
+import 'package:flutter/cupertino.dart';
+
+import '../../../about/internal/application/ServerProfile.dart';
+import 'ServerSetupState.dart';
+
+/// Guided onboarding after registering a new server: connect → show what the
+/// environment already has → ask what else to set up → install it.
+class ServerSetup extends StatefulWidget {
+  final ServerProfile server;
+
+  const ServerSetup({super.key, required this.server});
+
+  @override
+  State<ServerSetup> createState() => ServerSetupState();
+}