feat(battle-engine): full Unity/VFX/god-object shims + expanded copy closure (2570 files)

Authored Unity primitive/object-model shim, VFX layer (control-flow-preserving, InstantVfx never invokes its action -- headless suppression), god-object stubs (GameMgr/EffectMgr/UIManager with faithfully-extracted nested enums), View/UI/Touch tree, LitJson+BetterList+Tuple copied, third-party stubs. Discovered Roslyn header-error masking: fixing class-header type errors unmasks body references, so the true copy closure is ~2570 files (was 782 under masking). Errors: masked-25720 -> 268; our shim files compile clean. Remaining: ~50 residual shim/external types, 24 NGUI UI-base overrides, static-type fixes, plus likely 1-2 more unmask waves.

SVSim.BattleEngine/Engine/LitJson/ParserToken.cs

@@ -0,0 +1,24 @@
+namespace LitJson;
+
+internal enum ParserToken
+{
+	None = 65536,
+	Number,
+	True,
+	False,
+	Null,
+	CharSeq,
+	Char,
+	Text,
+	Object,
+	ObjectPrime,
+	Pair,
+	PairRest,
+	Array,
+	ArrayPrime,
+	Value,
+	ValueRest,
+	String,
+	End,
+	Epsilon
+}