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/SealedStepFuncs.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections;
+
+namespace Wizard;
+
+public class SealedStepFuncs
+{
+	public Func<IEnumerator> InitFunc { get; private set; }
+
+	public Action FinalFunc { get; private set; }
+
+	public SealedStepFuncs(Func<IEnumerator> initFunc, Action finalFunc)
+	{
+		InitFunc = initFunc;
+		FinalFunc = finalFunc;
+	}
+}