fix: Moves ContextMenu out of core, streamlines code, fixes bugs (#1873)

## Summary
- Removes allocation of a `List<ContextMenuEntry>` every time a context menu is created.
- Moves packet/context menu creation logic out of the core
- Fixes tame entry

## BREAKING CHANGE
> [!Important]
> **Developer Note**
> ```cs
> public virtual void GetContextMenuEntries(Mobile from, List<ContextMenuEntry> list)
> ```
> and similar functions changed to
> ```cs
> public virtual void GetContextMenuEntries(Mobile from, ref PooledRefList<ContextMenuEntry> list)
> ```

Projects/Server/ContextMenus/ContextMenuEntry.cs

@@ -1,3 +1,18 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright 2019-2024 - ModernUO Development Team                       *
+ * Email: hi@modernuo.com                                                *
+ * File: ContextMenuEntry.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.Network;
 
 namespace Server.ContextMenus;
@@ -42,11 +57,6 @@ public class ContextMenuEntry
     /// </summary>
     public CMEFlags Flags { get; set; }
 
-    /// <summary>
-    ///     Gets or sets the <see cref="ContextMenu" /> that owns this entry.
-    /// </summary>
-    public ContextMenu Owner { get; set; }
-
     /// <summary>
     ///     Gets or sets the localization number containing the name of this entry.
     /// </summary>
@@ -76,7 +86,7 @@ public class ContextMenuEntry
     /// <summary>
     ///     Overridable. Virtual event invoked when the entry is clicked.
     /// </summary>
-    public virtual void OnClick()
+    public virtual void OnClick(Mobile from, IEntity target)
     {
     }
 }