refactor : replace meshColider to boxColider

Assets/Level/Prefabs/World/Walls/Wall_20x20.prefab

@@ -13,7 +13,7 @@ GameObject:
   - component: {fileID: 8919132446416476197}
   - component: {fileID: 41428191948269809}
   - component: {fileID: 6573846855040029712}
-  - component: {fileID: 1370727102558677880}
+  - component: {fileID: 5129551515659329284}
   m_Layer: 0
   m_Name: Wall_20x20
   m_TagString: Untagged
@@ -334,8 +334,8 @@ MeshFilter:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 4661870688722979362}
   m_Mesh: {fileID: 0}
---- !u!64 &1370727102558677880
-MeshCollider:
+--- !u!65 &5129551515659329284
+BoxCollider:
   m_ObjectHideFlags: 0
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
@@ -352,7 +352,6 @@ MeshCollider:
   m_IsTrigger: 0
   m_ProvidesContacts: 0
   m_Enabled: 1
-  serializedVersion: 5
-  m_Convex: 0
-  m_CookingOptions: 30
-  m_Mesh: {fileID: 0}
+  serializedVersion: 3
+  m_Size: {x: 0.1, y: 20, z: 30}
+  m_Center: {x: 0, y: 0, z: 0}