```

feat(materials): 删除TowerEnemy和TowerPlayer材质文件

移除项目中不再需要的TowerEnemy.mat和TowerPlayer.mat材质文件，
以及对应的.meta元数据文件。这些材质文件已通过其他方式重构或不再使用。
```

Assets/Prefabs/第一章/盾卫.prefab

@@ -68,6 +68,16 @@ PrefabInstance:
       propertyPath: m_LocalEulerAnglesHint.z
       value: 0
       objectReference: {fileID: 0}
+    - target: {fileID: -7511558181221131132, guid: 6aca4bb5878af445d8293bd74e9de170,
+        type: 3}
+      propertyPath: m_Materials.Array.size
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: -7511558181221131132, guid: 6aca4bb5878af445d8293bd74e9de170,
+        type: 3}
+      propertyPath: m_Materials.Array.data[1]
+      value: 
+      objectReference: {fileID: 2100000, guid: 33c430f15cc564e098b64444c55c60a7, type: 2}
     - target: {fileID: 919132149155446097, guid: 6aca4bb5878af445d8293bd74e9de170,
         type: 3}
       propertyPath: m_Name
@@ -142,6 +152,16 @@ PrefabInstance:
       propertyPath: m_LocalEulerAnglesHint.z
       value: 0
       objectReference: {fileID: 0}
+    - target: {fileID: -7676612043611361953, guid: 17f7a1b7ae92f0948a5bebde8a11fc2b,
+        type: 3}
+      propertyPath: m_Materials.Array.size
+      value: 2
+      objectReference: {fileID: 0}
+    - target: {fileID: -7676612043611361953, guid: 17f7a1b7ae92f0948a5bebde8a11fc2b,
+        type: 3}
+      propertyPath: m_Materials.Array.data[1]
+      value: 
+      objectReference: {fileID: 2100000, guid: 33c430f15cc564e098b64444c55c60a7, type: 2}
     - target: {fileID: 919132149155446097, guid: 17f7a1b7ae92f0948a5bebde8a11fc2b,
         type: 3}
       propertyPath: m_Name
@@ -446,6 +466,16 @@ PrefabInstance:
       propertyPath: m_ConstrainProportionsScale
       value: 1
       objectReference: {fileID: 0}
+    - target: {fileID: -7511558181221131132, guid: 38a36e022524a4f40a80cadd9313ec49,
+        type: 3}
+      propertyPath: m_Materials.Array.size
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: -7511558181221131132, guid: 38a36e022524a4f40a80cadd9313ec49,
+        type: 3}
+      propertyPath: m_Materials.Array.data[1]
+      value: 
+      objectReference: {fileID: 2100000, guid: 33c430f15cc564e098b64444c55c60a7, type: 2}
     - target: {fileID: 919132149155446097, guid: 38a36e022524a4f40a80cadd9313ec49,
         type: 3}
       propertyPath: m_Name