fix(BT12-Dev-Clone δ): Tests/Editor asmdef main Assembly-CSharp reference 해제

CS0234 EerieVillage.Skills.Effectors namespace 부재 fix:
- 원인: asmdef overrideReferences=true·autoReferenced=false 영역 main Assembly-CSharp 차단
- fix: overrideReferences=false·precompiledReferences=[]·autoReferenced=true
- 결과: Test assembly 영역 default Assembly-CSharp 자동 reference (CloneInstance·PlayerSkillInventory 접근 OK)
- NUnit 영역 TestRunner reference 영역 정합 (UNITY_INCLUDE_TESTS define 유지)

자성: C39-10 위반 누적 (asmdef 영역 사전 실측 X·feedback_new_code_existing_system_dependency_unmeasured 재발 2회차)

Assets/Tests/Editor/EerieVillage.Tests.Editor.asmdef

@@ -10,11 +10,9 @@
     ],
     "excludePlatforms": [],
     "allowUnsafeCode": false,
-    "overrideReferences": true,
-    "precompiledReferences": [
-        "nunit.framework.dll"
-    ],
-    "autoReferenced": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
     "defineConstraints": [
         "UNITY_INCLUDE_TESTS"
     ],