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/RelayInfo.cs

@@ -0,0 +1,55 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright 2019-2024 - ModernUO Development Team                       *
+ * Email: hi@modernuo.com                                                *
+ * File: RelayInfo.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 Server.Text;
+using System;
+
+namespace Server.Gumps;
+
+public readonly ref struct RelayInfo
+{
+    private readonly ReadOnlySpan<byte> _textBlock;
+    private readonly ReadOnlySpan<ushort> _textIds;
+    private readonly ReadOnlySpan<Range> _textRanges;
+
+    public RelayInfo(
+        int buttonId,
+        ReadOnlySpan<int> switches,
+        ReadOnlySpan<ushort> textIds,
+        ReadOnlySpan<Range> textRanges,
+        ReadOnlySpan<byte> textBlock
+    )
+    {
+        ButtonID = buttonId;
+        Switches = switches;
+        _textIds = textIds;
+        _textRanges = textRanges;
+        _textBlock = textBlock;
+    }
+
+    public int ButtonID { get; }
+
+    public ReadOnlySpan<int> Switches { get; }
+
+    public bool IsSwitched(int switchId) => Switches.Contains(switchId);
+
+    public string GetTextEntry(int entryId)
+    {
+        int index = _textIds.IndexOf((ushort)entryId);
+        return index == -1
+            ? default
+            : TextEncoding.GetString(_textBlock[_textRanges[index]], TextEncoding.Unicode, true);
+    }
+}