feat: 서버 매니저 싱글톤으로 전환

Gameton-06/Assets/Gameton/Scenes/Main.unity

@@ -122,50 +122,6 @@ NavMeshSettings:
     debug:
       m_Flags: 0
   m_NavMeshData: {fileID: 0}
---- !u!1 &195665660
-GameObject:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  serializedVersion: 6
-  m_Component:
-  - component: {fileID: 195665661}
-  - component: {fileID: 195665662}
-  m_Layer: 0
-  m_Name: TON.Backend
-  m_TagString: Untagged
-  m_Icon: {fileID: 0}
-  m_NavMeshLayer: 0
-  m_StaticEditorFlags: 0
-  m_IsActive: 1
---- !u!4 &195665661
-Transform:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 195665660}
-  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: 384034828}
-  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
---- !u!114 &195665662
-MonoBehaviour:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 195665660}
-  m_Enabled: 1
-  m_EditorHideFlags: 0
-  m_Script: {fileID: 11500000, guid: 997aacd350268d041bba7f34cf767394, type: 3}
-  m_Name: 
-  m_EditorClassIdentifier: 
 --- !u!1 &384034827
 GameObject:
   m_ObjectHideFlags: 0
@@ -195,8 +151,7 @@ Transform:
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
-  m_Children:
-  - {fileID: 195665661}
+  m_Children: []
   m_Father: {fileID: 0}
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!114 &384034829