[Scene] 테스트 씬 및 네트워크 설정 업데이트

Ultraworked with [Sisyphus](https://github.com/code-yeonggu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Assets/Prefabs/Player/Player.prefab

@@ -23,7 +23,7 @@ GameObject:
   - component: {fileID: 1242716222252539497}
   m_Layer: 0
   m_Name: Player
-  m_TagString: Untagged
+  m_TagString: Player
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
@@ -104,7 +104,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: d5a57f767e5e46a458fc5d3c628d0cbb, type: 3}
   m_Name: 
   m_EditorClassIdentifier: Unity.Netcode.Runtime::Unity.Netcode.NetworkObject
-  GlobalObjectIdHash: 291279334
+  GlobalObjectIdHash: 652883547
   InScenePlacedSourceGlobalObjectIdHash: 0
   DeferredDespawnTick: 0
   Ownership: 1