docs: update resources API docs

docs/api/resources/textureimportsettings/setgeneratemipmaps.md

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+# TextureImportSettings::SetGenerateMipmaps / GetGenerateMipmaps
+
+```cpp
+void SetGenerateMipmaps(bool generate);
+bool GetGenerateMipmaps() const;
+```
+
+设置或获取是否生成 Mipmap。
+
+**参数：**
+- `generate` - 是否生成 Mipmap
+
+**返回：** `bool` / `void`
+
+**线程安全：** ✅
+
+**示例：**
+
+```cpp
+TextureImportSettings settings;
+settings.SetGenerateMipmaps(true);
+bool generate = settings.GetGenerateMipmaps(); // true
+```
+
+## 相关文档
+
+- [TextureImportSettings 总览](textureimportsettings.md) - 返回类总览