refactor: FBX 애니메이션 클립 독립 .anim 추출 및 자동 등록 시스템 구축

- FBX 내장 AnimationClip을 개별 .anim 파일로 추출하는 에디터 툴 추가 (AnimationClipExtractor)
  - 스킬/보스/AnimatorController에서 참조 중인 클립만 선택적 추출
  - 추출 후 모든 참조(SkillData, BossPhaseData, AnimatorController)를 .anim으로 자동 relink
  - 추출 완료된 FBX 자동 삭제 (참조 안전성 검증 포함)
- SkillController: registeredClips를 OnValidate에서 _Player_ 이름 기반 자동 등록
- PlayerSkillInput: skillSlots를 OnValidate에서 _Skill_Player_ 이름 기반 자동 등록
- 38개 FBX 삭제, 40+개 .anim 파일로 교체 완료

Assets/_Game/Models/Model_Weapon_검.prefab

@@ -11,6 +11,7 @@ GameObject:
   - component: {fileID: 4561571508225656}
   - component: {fileID: 33122181552623900}
   - component: {fileID: 23019494539852092}
+  - component: {fileID: -7072649262298426999}
   m_Layer: 0
   m_Name: "Model_Weapon_\uAC80"
   m_TagString: Untagged
@@ -25,12 +26,13 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1631607032641582}
+  serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 0}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!33 &33122181552623900
 MeshFilter:
@@ -51,10 +53,17 @@ MeshRenderer:
   m_CastShadows: 1
   m_ReceiveShadows: 1
   m_DynamicOccludee: 1
+  m_StaticShadowCaster: 0
   m_MotionVectors: 1
   m_LightProbeUsage: 1
   m_ReflectionProbeUsage: 1
   m_RayTracingMode: 2
+  m_RayTraceProcedural: 0
+  m_RayTracingAccelStructBuildFlagsOverride: 0
+  m_RayTracingAccelStructBuildFlags: 1
+  m_SmallMeshCulling: 1
+  m_ForceMeshLod: -1
+  m_MeshLodSelectionBias: 0
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
@@ -76,6 +85,34 @@ MeshRenderer:
   m_AutoUVMaxDistance: 0.5
   m_AutoUVMaxAngle: 89
   m_LightmapParameters: {fileID: 0}
+  m_GlobalIlluminationMeshLod: 0
   m_SortingLayerID: 0
   m_SortingLayer: 0
   m_SortingOrder: 0
+  m_MaskInteraction: 0
+  m_AdditionalVertexStreams: {fileID: 0}
+--- !u!114 &-7072649262298426999
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1631607032641582}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: d5a57f767e5e46a458fc5d3c628d0cbb, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: Unity.Netcode.Runtime::Unity.Netcode.NetworkObject
+  GlobalObjectIdHash: 1055594762
+  InScenePlacedSourceGlobalObjectIdHash: 0
+  DeferredDespawnTick: 0
+  Ownership: 1
+  AlwaysReplicateAsRoot: 0
+  SynchronizeTransform: 1
+  ActiveSceneSynchronization: 0
+  SceneMigrationSynchronization: 1
+  SpawnWithObservers: 1
+  DontDestroyWithOwner: 0
+  AutoObjectParentSync: 1
+  SyncOwnerTransformWhenParented: 1
+  AllowOwnerToParent: 0