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/Items/Aquarium/Aquarium.cs

@@ -4,6 +4,7 @@ using System.Runtime.CompilerServices;
 using ModernUO.Serialization;
 using Server.Collections;
 using Server.ContextMenus;
+using Server.Gumps;
 using Server.Multis;
 using Server.Network;
 
@@ -875,8 +876,7 @@ namespace Server.Items
                 return;
             }
 
-            from.CloseGump<AquariumGump>();
-            from.SendGump(new AquariumGump(this, HasAccess(from)));
+            from.SendGump(new AquariumGump(this, HasAccess(from)), true);
 
             from.PlaySound(0x5A4);
         }