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/NullNotTurnStartToLoseChecker.cs

@@ -0,0 +1,18 @@
+public class NullNotTurnStartToLoseChecker : NotTurnStartToLoseChecker
+{
+	public override void StopChecker()
+	{
+	}
+
+	protected override void IntervalCheck()
+	{
+	}
+
+	public override void FinishChecker()
+	{
+	}
+
+	public override void StartChecker(string log = "")
+	{
+	}
+}