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/Cute/PCPlatformSTEAM.cs

@@ -0,0 +1,34 @@
+using LitJson;
+
+namespace Cute;
+
+public class PCPlatformSTEAM : PCPlatform
+{
+	protected PaymentPCStartParamsSTEAM _postParams = new PaymentPCStartParamsSTEAM();
+
+	public static string State { get; private set; }
+
+	public static string Country { get; private set; }
+
+	public static string Currency { get; private set; }
+
+	public static string Status { get; private set; }
+
+	public override PaymentPCStartParams SetParameter(string productId, bool isAlertAgree, bool isAlertActive)
+	{
+		_postParams.product_id = productId;
+		_postParams.price = PaymentPC.GetInstance().ProductPriceList[productId];
+		_postParams.ip_address = Toolbox.DeviceManager.GetIpAddress();
+		_postParams.isalertagree = (isAlertAgree ? 1 : 0);
+		_postParams.isalertactive = (isAlertActive ? 1 : 0);
+		return _postParams;
+	}
+
+	public override void Parse(JsonData response)
+	{
+		State = response["steam_user_info"]["state"].ToString();
+		Country = response["steam_user_info"]["country"].ToString();
+		Currency = response["steam_user_info"]["currency"].ToString();
+		Status = response["steam_user_info"]["status"].ToString();
+	}
+}