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/RegisterChangeUnionBurstCount.cs

@@ -0,0 +1,35 @@
+using System.Collections.Generic;
+using System.Linq;
+
+public class RegisterChangeUnionBurstCount : RegisterAlter
+{
+	private int _gainValue;
+
+	private readonly string UnionBurstCountParameter = "unionburst";
+
+	public RegisterChangeUnionBurstCount(List<BattleCardBase> cardList, SkillBase skill, int gainCount)
+		: base(cardList, skill)
+	{
+		base.IndexList = new List<int>();
+		if (cardList != null && cardList.Count > 0)
+		{
+			cardList.ForEach(delegate(BattleCardBase x)
+			{
+				if (!base.IndexList.Any((int z) => z == x.Index))
+				{
+					base.IndexList.Add(x.Index);
+				}
+			});
+		}
+		_gainValue = gainCount;
+		IsSelf = skill.SkillPrm.ownerCard.IsPlayer;
+	}
+
+	public override Dictionary<string, object> MakeSendData()
+	{
+		Dictionary<string, object> dictionary = base.MakeSendData();
+		dictionary.Add(ActionBaseParameter.type.ToString(), ActionBaseParameter.add.ToString());
+		dictionary.Add(UnionBurstCountParameter, "a+" + _gainValue);
+		return MakeAttachTarget(dictionary);
+	}
+}