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.

accounts/models.py

@@ -0,0 +1,21 @@
+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"