feat: Use allauth and add passkey support

src/fellchensammlung/urls.py

@@ -94,15 +94,6 @@ urlpatterns = [
     path("user/notifications/", views.my_notifications, name="user-notifications"),
     path('user/me/export/', views.export_own_profile, name='user-me-export'),
 
-    path('accounts/register/',
-         registration_views.HTMLMailRegistrationView.as_view(
-             form_class=CustomRegistrationForm,
-             email_body_template="fellchensammlung/mail/activation_email.html",
-         ),
-         name='django_registration_register',
-         ),
-    path('accounts/', include('django_registration.backends.activation.urls')),
-    path('accounts/', include('django.contrib.auth.urls')),
 
     path('change-language', views.change_language, name="change-language"),