Start to add a proton submenu

lib/home.dart

@@ -55,10 +55,12 @@ class HomePageState extends State<HomePage> {
           padding: EdgeInsets.all(16),
           child: Column(
             children: [
-              if(Platform.isLinux)
-                ListTile(title: Text("Proton"),
+              if (Platform.isLinux)
+                ListTile(
+                  title: Text("Proton"),
                   leading: Icon(CupertinoIcons.gear),
-                subtitle: Text("Linux Proton"),),  // Not yet implemented
+                  subtitle: Text("Linux Proton"),
+                ), // Not yet implemented
               ListTile(
                 title: Text("SteamCMD"),
                 leading: Icon(Icons.comment_rounded),

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")),
+    );
+  }
+}