Start to add a proton submenu

lib/proton.dart

@@ -0,0 +1,17 @@
+import 'package:flutter/material.dart';
+
+class Proton extends StatefulWidget {
+  Proton({super.key});
+
+  @override
+  ProtonState createState() => ProtonState();
+}
+
+class ProtonState extends State<Proton> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: Text("Proton Manager")),
+    );
+  }
+}