Move PaperSystem to Shared (#30592)

* Fix paper system late localization

* IS THIS WHAT YOU WANT

* well I guess this is happening now

* fix the BUI

* did that even do anything before?

* again with the escapeformatting...

* Dirtying

* Move dirty to function

* Rename PaperSystem to PaperVisualizerSystem

* Fix namespace

* how many namespace changes must I suffer through

* SetContent is for Setting Content

* minor shuffling

* review

---------

Co-authored-by: plykiya <plykiya@protonmail.com>
Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Client/Paper/UI/PaperVisualizerSystem.cs

@@ -0,0 +1,29 @@
+using Robust.Client.GameObjects;
+
+using static Content.Shared.Paper.PaperComponent;
+
+namespace Content.Client.Paper.UI;
+
+public sealed class PaperVisualizerSystem : VisualizerSystem<PaperVisualsComponent>
+{
+    protected override void OnAppearanceChange(EntityUid uid, PaperVisualsComponent component, ref AppearanceChangeEvent args)
+    {
+        if (args.Sprite == null)
+            return;
+
+        if (AppearanceSystem.TryGetData<PaperStatus>(uid, PaperVisuals.Status , out var writingStatus, args.Component))
+            args.Sprite.LayerSetVisible(PaperVisualLayers.Writing, writingStatus == PaperStatus.Written);
+
+        if (AppearanceSystem.TryGetData<string>(uid, PaperVisuals.Stamp, out var stampState, args.Component))
+        {
+            args.Sprite.LayerSetState(PaperVisualLayers.Stamp, stampState);
+            args.Sprite.LayerSetVisible(PaperVisualLayers.Stamp, true);
+        }
+    }
+}
+
+public enum PaperVisualLayers
+{
+    Stamp,
+    Writing
+}