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/Payment.cs

@@ -0,0 +1,43 @@
+using Wizard;
+
+public static class Payment
+{
+	private static bool initialized;
+
+	public static void initialize(PaymentImpl callback, string productKey)
+	{
+		PaymentImpl.GetInstance().paymentUI.StartLoading();
+		_ = initialized;
+		initialized = true;
+	}
+
+	public static void finalize()
+	{
+		if (initialized)
+		{
+			initialized = false;
+		}
+	}
+
+	public static void purchaseProduct(string productId, PaymentBase.RefundWarningType refundWarningType)
+	{
+		RefundWarningDialog.Start(refundWarningType, delegate
+		{
+			PaymentImpl.GetInstance().paymentUI.StartLoading(useTimeCount: true);
+		});
+	}
+
+	public static void getProductList(string[] productIds)
+	{
+		PaymentImpl.GetInstance().paymentUI.StartLoading(useTimeCount: true, forProductListInit: true);
+	}
+
+	public static void consumePurchase(string[] productIds, string orderId)
+	{
+		PaymentImpl.GetInstance().paymentUI.StartLoading(useTimeCount: true);
+	}
+
+	public static void UseDebugLog(bool useDebugLog)
+	{
+	}
+}