feat(battle-engine): close the AI-simulation subsystem (verbatim)

Copied the 89 uncopied AI*SimulationUtility/extension files defining the
AIVirtualCard/AIVirtualField extension methods; the compile loop then auto-closed
the revealed type deps (~3049 files total, drift-clean). 10.0k -> 62 errors.

SVSim.BattleEngine/Engine/Wizard/ArenaCommonLobbyLoadRequest.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+
+namespace Wizard;
+
+public class ArenaCommonLobbyLoadRequest
+{
+	public List<string> LoadAssetList { get; set; }
+
+	public Action LoadEndCallback { get; set; }
+
+	public ArenaCommonLobbyLoadRequest()
+	{
+		LoadAssetList = new List<string>();
+	}
+}