fix(BT12-Dev): Tutorial Framework 패키지 제거 (SceneObjectGuid 중복 GUID 근본 해결)

PD: "여전히 에러 발생중 — ArgumentException SceneObjectGuid Register"

근본:
- 직전 commit 4714299에서 Scene Player의 SceneObjectGuid 제거했으나
- Unity Tutorial Framework 패키지 (com.unity.learn.iet-framework 5.0.3) 자체 활성
- OnValidate hook이 잔존 SceneObjectGuid 등록 시도 → 중복 GUID dictionary 등록

fix:
1. Packages/manifest.json — com.unity.learn.iet-framework 의존 제거
2. Scene 추가 SceneObjectGuid 폐기 (Token 1개 잔존 확인·폐기)
3. Tutorial 패키지 자체 제거 → OnValidate hook 영역 제거·근본

회귀 영역 X:
- Tutorial Framework는 Unity 학습용·게임 로직 무관
- 다른 패키지 영향 X

PD Editor 재시작 권고 — Library/PackageCache 영역 reload 후 SceneObjectGuid type 완전 제거.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Assets/Scenes/Ingame.unity

@@ -120277,7 +120277,6 @@ GameObject:
   - component: {fileID: 631861677}
   - component: {fileID: 631861676}
   - component: {fileID: 631861675}
-  - component: {fileID: 631861678}
   m_Layer: 0
   m_Name: Token
   m_TagString: TutorialRequirement
@@ -120433,19 +120432,6 @@ SpriteRenderer:
   m_SpriteTileMode: 0
   m_WasSpriteAssigned: 1
   m_SpriteSortPoint: 0
---- !u!114 &631861678
-MonoBehaviour:
-  m_ObjectHideFlags: 2
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 631861673}
-  m_Enabled: 1
-  m_EditorHideFlags: 0
-  m_Script: {fileID: 11500000, guid: c8534e17a0f90604c9afd4f5c73d829f, type: 3}
-  m_Name: 
-  m_EditorClassIdentifier: 
-  m_Id: 853d1d12-048e-49ae-b0d4-916bccd493cf
 --- !u!1001 &632887080
 PrefabInstance:
   m_ObjectHideFlags: 0

Packages/manifest.json

@@ -7,7 +7,6 @@
     "com.unity.feature.2d": "2.0.2",
     "com.unity.feature.development": "1.0.2",
     "com.unity.inputsystem": "1.19.0",
-    "com.unity.learn.iet-framework": "5.0.3",
     "com.unity.multiplayer.center": "1.0.1",
     "com.unity.render-pipelines.universal": "17.3.0",
     "com.unity.test-framework": "1.6.0",