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/Server/IVirtualCheckGump.cs

@@ -0,0 +1,13 @@
+using Server.Items;
+
+namespace Server.Gumps
+{
+    public interface IVirtualCheckGump
+    {
+        public VirtualCheck Check { get; }
+
+        public void Send();
+        public void Refresh(bool recompile);
+        public void Close();
+    }
+}