enhancement: introduce Ruff for Python linter for reordering and removing unused imports with automated pre-commit and sytle check (#2366)

api/core/data_loader/loader/pdf.py

@@ -1,10 +1,11 @@
 import logging
 from typing import List, Optional
 
-from extensions.ext_storage import storage
 from langchain.document_loaders import PyPDFium2Loader
 from langchain.document_loaders.base import BaseLoader
 from langchain.schema import Document
+
+from extensions.ext_storage import storage
 from models.model import UploadFile
 
 logger = logging.getLogger(__name__)