refac: mv backend files to /open_webui dir

src/lib/components/workspace/Functions/FunctionEditor.svelte

@@ -98,7 +98,7 @@ class Filter:
 
 	const _boilerplate = `from pydantic import BaseModel
 from typing import Optional, Union, Generator, Iterator
-from utils.misc import get_last_user_message
+from open_webui.utils.misc import get_last_user_message
 
 import os
 import requests