Add unit tests for models and services

- Implemented unit tests for Object model including folder and file creation, properties, and path retrieval.
- Added unit tests for Setting model covering creation, unique constraints, and type enumeration.
- Created unit tests for User model focusing on user creation, uniqueness, and group relationships.
- Developed unit tests for Login service to validate login functionality, including 2FA and token generation.
- Added utility tests for JWT creation and verification, ensuring token integrity and expiration handling.
- Implemented password utility tests for password generation, hashing, and TOTP verification.

utils/JWT/__init__.py

@@ -0,0 +1,8 @@
+from . import JWT
+from .JWT import (
+    create_access_token,
+    create_refresh_token,
+    load_secret_key,
+    oauth2_scheme,
+    SECRET_KEY,
+)