Add ban list window (#12574)

Content.Client/Administration/UI/BanList/BanListHeader.xaml.cs

@@ -0,0 +1,14 @@
+using Robust.Client.AutoGenerated;
+using Robust.Client.UserInterface.Controls;
+using Robust.Client.UserInterface.XAML;
+
+namespace Content.Client.Administration.UI.BanList;
+
+[GenerateTypedNameReferences]
+public sealed partial class BanListHeader : ContainerButton
+{
+    public BanListHeader()
+    {
+        RobustXamlLoader.Load(this);
+    }
+}