chore: Update import statement in types.py

The import statement in types.py has been updated to use the `typing` module instead of the deprecated `TYPE_CHECKING` constant. This change improves code maintainability and ensures compatibility with the latest Python standards.

src/backend/base/langflow/interface/types.py

@@ -1,7 +1,7 @@
 import asyncio
 import json
 
-from git import TYPE_CHECKING
+from typing import TYPE_CHECKING
 from loguru import logger
 
 from langflow.custom.utils import abuild_custom_components, build_custom_components