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/urls.py

@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from django.urls import path
+
+from accounts import views
+
+app_name = "accounts"
+
+urlpatterns = [
+    path("login/", views.CustomLoginView.as_view(), name="login"),
+    path("logout/", views.CustomLogoutView.as_view(), name="logout"),
+    path("signup/", views.SignUpView.as_view(), name="signup"),
+    path("profile/", views.profile_view, name="profile"),
+]