feat: Moves gumps out of the core (#1916)

> [!Important]
> **Developer Note**
> This code change will **completely move gumps out of the core**


### Summary

- Adds `GetGumps()` convenience which exposes methods to Find/Close/Send multiple gumps. This helper is a performance improvement by eliminating the Dictionary<Player, List> lookup for gumps.

Projects/UOContent/Gumps/Base/Legacy/GumpHtmlLocalized.cs

@@ -0,0 +1,132 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright 2019-2024 - ModernUO Development Team                       *
+ * Email: hi@modernuo.com                                                *
+ * File: GumpHtmlLocalized.cs                                            *
+ *                                                                       *
+ * This program is free software: you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * You should have received a copy of the GNU General Public License     *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+using System.Buffers;
+using Server.Collections;
+
+namespace Server.Gumps;
+
+public enum GumpHtmlLocalizedType
+{
+    Plain,
+    Color,
+    Args
+}
+
+public class GumpHtmlLocalized : GumpEntry
+{
+    public GumpHtmlLocalized(
+        int x, int y, int width, int height, int number,
+        bool background = false, bool scrollbar = false
+    )
+    {
+        X = x;
+        Y = y;
+        Width = width;
+        Height = height;
+        Number = number;
+        Background = background;
+        Scrollbar = scrollbar;
+
+        Type = GumpHtmlLocalizedType.Plain;
+    }
+
+    public GumpHtmlLocalized(
+        int x, int y, int width, int height, int number, int color,
+        bool background = false, bool scrollbar = false
+    )
+    {
+        X = x;
+        Y = y;
+        Width = width;
+        Height = height;
+        Number = number;
+        Color = color;
+        Background = background;
+        Scrollbar = scrollbar;
+
+        Type = GumpHtmlLocalizedType.Color;
+    }
+
+    public GumpHtmlLocalized(
+        int x, int y, int width, int height, int number, string args, int color,
+        bool background = false, bool scrollbar = false
+    )
+    {
+        // Are multiple arguments unsupported? And what about non ASCII arguments?
+
+        X = x;
+        Y = y;
+        Width = width;
+        Height = height;
+        Number = number;
+        Args = args;
+        Color = color;
+        Background = background;
+        Scrollbar = scrollbar;
+
+        Type = GumpHtmlLocalizedType.Args;
+    }
+
+    public int X { get; set; }
+
+    public int Y { get; set; }
+
+    public int Width { get; set; }
+
+    public int Height { get; set; }
+
+    public int Number { get; set; }
+
+    public string Args { get; set; }
+
+    public int Color { get; set; }
+
+    public bool Background { get; set; }
+
+    public bool Scrollbar { get; set; }
+
+    public GumpHtmlLocalizedType Type { get; set; }
+
+
+    public override void AppendTo(ref SpanWriter writer, OrderedSet<string> strings, ref int entries, ref int switches)
+    {
+        switch (Type)
+        {
+            default:
+            case GumpHtmlLocalizedType.Plain:
+                {
+                    writer.WriteAscii(
+                        $"{{ xmfhtmlgump {X} {Y} {Width} {Height} {Number} {(Background ? "1" : "0")} {(Scrollbar ? "1" : "0")} }}"
+                    );
+                    break;
+                }
+            case GumpHtmlLocalizedType.Color:
+                {
+                    writer.WriteAscii(
+                        $"{{ xmfhtmlgumpcolor {X} {Y} {Width} {Height} {Number} {(Background ? "1" : "0")} {(Scrollbar ? "1" : "0")} {Color} }}"
+                    );
+                    break;
+                }
+            case GumpHtmlLocalizedType.Args:
+                {
+                    writer.WriteAscii(
+                        $"{{ xmfhtmltok {X} {Y} {Width} {Height} {(Background ? "1" : "0")} {(Scrollbar ? "1" : "0")} {Color} {Number} @{Args}@ }}"
+                    );
+                    break;
+                }
+        }
+    }
+}