Add app source and tests

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

lib/Peach/see/configuration/Configuration.dart

@@ -0,0 +1,16 @@
+import 'package:flutter/cupertino.dart';
+
+import '../../about/internal/application/ServerProfile.dart';
+import 'ConfigurationState.dart';
+
+/// Probes the server's environment (Java, MariaDB, Postgres, nginx, Docker,
+/// Node, Git), shows what's present, and guides installing what's missing
+/// using the auto-detected package manager — preview, then confirm.
+class Configuration extends StatefulWidget {
+  final ServerProfile server;
+
+  const Configuration({super.key, required this.server});
+
+  @override
+  State<Configuration> createState() => ConfigurationState();
+}