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/SetHealModifierInfo.cs

@@ -0,0 +1,27 @@
+public class SetHealModifierInfo : HealModifier
+{
+	private bool _isTargetSelfClass;
+
+	public int SetHealAmount { get; private set; }
+
+	public SetHealModifierInfo(int setHealAmount, int order, BattleCardBase owner, bool isTargetSelfClass)
+	{
+		SetHealAmount = setHealAmount;
+		base.OrderCount = order;
+		_owner = owner;
+		_isTargetSelfClass = isTargetSelfClass;
+	}
+
+	public override int Calc(int healAmount, BattleCardBase healOwner, BattleCardBase target)
+	{
+		if (_isTargetSelfClass)
+		{
+			if (target.IsClass && _owner == target)
+			{
+				return SetHealAmount;
+			}
+			return healAmount;
+		}
+		return SetHealAmount;
+	}
+}