Consider adding `django-modern-rest` as an API option

Hi

I am the author of both django-stubs and django-modern-rest: https://github.com/wemake-services/django-modern-rest

I saw that API layer is now configurable: https://github.com/cookiecutter/cookiecutter-django/pull/6088

I would love to contribute DMR as an API target. Here's how it looks in wemake-django-template: https://github.com/wemake-services/wemake-django-template/blob/master/%7B%7Bcookiecutter.project_name%7D%7D/server/apps/main/api/views.py

If maintainers agree, I will send a PR for that :)