```

docs(clipboard): 添加剪贴板功能相关图片资源

添加了两个剪贴板功能的截图文件，用于文档说明和功能展示。
```

Assets/Materials/BattleArenaCourtyard.mat

@@ -41,11 +41,11 @@ Material:
         m_Offset: {x: 0, y: 0}
     - _EmissionMap:
         m_Texture: {fileID: 0}
-        m_Scale: {x: 1, y: 1}
+        m_Scale: {x: 3, y: 10}
         m_Offset: {x: 0, y: 0}
     - _MainTex:
         m_Texture: {fileID: 2800000, guid: 4435756e5310e408fb125e8f4bcee9bd, type: 3}
-        m_Scale: {x: 3, y: 4.5}
+        m_Scale: {x: 3, y: 10}
         m_Offset: {x: 0, y: 0}
     - _MetallicGlossMap:
         m_Texture: {fileID: 0}