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/models.py

@@ -1,21 +0,0 @@
-from __future__ import annotations
-
-from django.contrib.auth.models import AbstractUser
-
-
-class User(AbstractUser):
-    """Custom User model extending Django's AbstractUser.
-
-    This allows for future customization of the User model
-    while maintaining all the default Django User functionality.
-    """
-
-    # Add any custom fields here in the future
-    # For example:
-    # bio = models.TextField(max_length=500, blank=True)
-    # avatar = models.ImageField(upload_to='avatars/', blank=True, null=True)
-
-    class Meta:
-        db_table = "auth_user"  # Keep the same table name as Django's default User
-        verbose_name = "User"
-        verbose_name_plural = "Users"