add media category api

app/chain/__init__.py

@@ -506,6 +506,13 @@ class ChainBase(metaclass=ABCMeta):
         self.run_module("scrape_metadata", path=path, mediainfo=mediainfo, metainfo=metainfo,
                         transfer_type=transfer_type, force_nfo=force_nfo, force_img=force_img)
 
+    def media_category(self) -> Optional[Dict[str, list]]:
+        """
+        获取媒体分类
+        :return: 获取二级分类配置字典项，需包括电影、电视剧、动漫
+        """
+        return self.run_module("media_category")
+
     def register_commands(self, commands: Dict[str, dict]) -> None:
         """
         注册菜单命令