feat: provide action decorator to pass label, description and atts to the admin method

[Alexerson]

Add an @action decorator that behave's like Django's admin.action decorator¹ to clean up customizing object actions.

closes #115

Also relates to #107

Footnotes

1. https://docs.djangoproject.com/en/stable/ref/contrib/admin/actions/#django.contrib.admin.action ↩

[Alexerson]

I reused the same logic that is now in the django project. The test is a bit tautological, but at least it’s here. Let me know if you have any suggested changes.

[crccheck]

Thanks, if I need to do a major version release to drop old Django versions, I can do that. I'm just starting to get back into Python/Django so I can hopefully take a deeper look soon.

[Alexerson]

I messed up with the test, sorry about that. Pushing the fix. I don’t think we need to drop anything for this to be merged, but let’s see once the tests run again.

[crccheck]

I finally sat down and looked at the Django @action doc and everything looks good to me. I'm a little worried that action is too generic/overloaded but people can always rename it like

from django_object_actions import DjangoObjectActions, action as chocolate

I had one note but it's not a big deal. I'll merge tomorrow either way.

[Alexerson]

That’s what happen when you copy code…
All good, thanks!