Paper QOL improvements (#32418)

* Don't add newlines (fixes #32357)

* Improve UI around max paper length (Fixes #32344)

* Display a "fill progress" indicator so users know how close they are to filling it
* Don't allow users to save a paper which went over the limit, to avoid them losing data they want to keep.

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

Content.Client/Paper/UI/PaperBoundUserInterface.cs

@@ -2,6 +2,7 @@ using JetBrains.Annotations;
 using Robust.Client.UserInterface;
 using Robust.Client.UserInterface.Controls;
 using Robust.Shared.Utility;
+using Content.Shared.Paper;
 using static Content.Shared.Paper.PaperComponent;
 
 namespace Content.Client.Paper.UI;
@@ -23,6 +24,10 @@ public sealed class PaperBoundUserInterface : BoundUserInterface
         _window = this.CreateWindow<PaperWindow>();
         _window.OnSaved += InputOnTextEntered;
 
+        if (EntMan.TryGetComponent<PaperComponent>(Owner, out var paper))
+        {
+            _window.MaxInputLength = paper.ContentSize;
+        }
         if (EntMan.TryGetComponent<PaperVisualsComponent>(Owner, out var visuals))
         {
             _window.InitVisuals(Owner, visuals);