Implement user authentication system with custom user model, views, and templates

- Created custom User model extending Django's AbstractUser.
- Added user registration, login, and profile views with corresponding templates.
- Implemented user authentication functionality and integrated Bootstrap for styling.
- Updated project settings to use the new accounts app and user model.
- Added tests for user model and admin functionality.

core/apps.py

@@ -1,17 +0,0 @@
-from __future__ import annotations
-
-from django.apps import AppConfig
-
-
-class CoreConfig(AppConfig):
-    """Configuration class for the 'core' Django application.
-
-    Attributes:
-        default_auto_field (str): Specifies the type of auto-created primary key field to use for models in this app.
-        name (str): The full Python path to the application.
-        verbose_name (str): A human-readable name for the application.
-    """
-
-    default_auto_field: str = "django.db.models.BigAutoField"
-    name = "core"
-    verbose_name: str = "Core Application"