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/Data/Skills/Data_Skill_Drog_투척.asset

@@ -13,10 +13,14 @@ MonoBehaviour:
   m_Name: "Data_Skill_Drog_\uD22C\uCC99"
   m_EditorClassIdentifier: Colosseum.Game::Colosseum.Skills.SkillData
   skillName: "\uD22C\uCC99"
-  description: "\uB4DC\uB85C\uADF8\uAC00 \uC8FC \uB300\uC0C1 \uBC16\uC758 \uC6D0\uAC70\uB9AC \uD50C\uB808\uC774\uC5B4\uB97C \uACAC\uC81C\uD558\uB294 \uD22C\uC0AC\uCCB4 \uACF5\uACA9\uC785\uB2C8\uB2E4."
+  description: "\uB4DC\uB85C\uADF8\uAC00 \uC8FC \uB300\uC0C1 \uBC16\uC758 \uC6D0\uAC70\uB9AC
+    \uD50C\uB808\uC774\uC5B4\uB97C \uACAC\uC81C\uD558\uB294 \uD22C\uC0AC\uCCB4 \uACF5\uACA9\uC785\uB2C8\uB2E4."
   icon: {fileID: 0}
-  skillClip: {fileID: -7717634560727564301, guid: 4005a77aa7d531742b1de1bec27001b1, type: 3}
-  endClip: {fileID: -8265974341663887746, guid: d3e4690f866332b43b86ee7005291cd0, type: 3}
+  skillRole: 1
+  activationType: 1
+  baseTypes: 0
+  skillClip: {fileID: 7400000, guid: 7bc1524e81d48d54baa204cc0d22edea, type: 2}
+  endClip: {fileID: 7400000, guid: 15519f6d5b8e5ba4194d4b8256ebb60d, type: 2}
   animationSpeed: 1
   useRootMotion: 0
   ignoreRootMotionY: 1
@@ -24,7 +28,10 @@ MonoBehaviour:
   blockMovementWhileCasting: 1
   blockJumpWhileCasting: 1
   blockOtherSkillsWhileCasting: 1
+  allowedWeaponTraits: 0
   cooldown: 0
   manaCost: 0
+  maxGemSlotCount: 2
+  castStartEffects: []
   effects:
   - {fileID: 11400000, guid: 7cb93b3b54be4e59b40f2f1f6dcf2c63, type: 2}