feat: 小红书笔记搜索，评论获取done

docs: update docs

Create .gitattributes

Update README.md

media_platform/xhs/exception.py

@@ -0,0 +1,9 @@
+from httpx import RequestError
+
+
+class DataFetchError(RequestError):
+    """something error when fetch"""
+
+
+class IPBlockError(RequestError):
+    """fetch so fast that the server block us ip"""