Admin Options tab (#35543)

* admin options tab initial

* make admin tab only visible to admins

Content.Client/Options/UI/Tabs/AdminOptionsTab.xaml.cs

@@ -0,0 +1,20 @@
+using Content.Shared.CCVar;
+using Robust.Client.AutoGenerated;
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.XAML;
+
+namespace Content.Client.Options.UI.Tabs;
+
+[GenerateTypedNameReferences]
+public sealed partial class AdminOptionsTab : Control
+{
+    public AdminOptionsTab()
+    {
+        RobustXamlLoader.Load(this);
+
+        Control.AddOptionCheckBox(CCVars.AdminOverlayClassic, EnableClassicOverlayCheckBox);
+
+        Control.Initialize();
+    }
+}
+