Improve Paper UI, allow an to entity configure how it's UI looks (#13494)

Co-authored-by: Eoin Mcloughlin <helloworld@eoinrul.es>

Content.Client/Paper/UI/StampWidget.xaml.cs

@@ -0,0 +1,23 @@
+using Content.Shared.Paper;
+using Robust.Client.AutoGenerated;
+using Robust.Client.UserInterface.Controls;
+using Robust.Client.UserInterface.CustomControls;
+using Robust.Client.UserInterface.XAML;
+using Robust.Shared.Utility;
+
+namespace Content.Client.Paper.UI
+{
+    [GenerateTypedNameReferences]
+    public sealed partial class StampWidget : Container
+    {
+        public string? Stamper {
+            get => StampedByLabel.Text;
+            set => StampedByLabel.Text = value;
+        }
+
+        public StampWidget()
+        {
+            RobustXamlLoader.Load(this);
+        }
+    }
+}