Move to Jazzband 🎷

[sarahboyce]

As per this discussion: https://github.com/brutasse/django-push/pull/28#issuecomment-1488818058

We're going to try to tranfer ownership of this project to Jazzband.

Guidelines: https://jazzband.co/about/guidelines

• [X] Viability Not a POC or a toy, an established projects with a history of outside contributions that seeks more maintainers ✅ Agreement from the previous maintainer(s) see: https://github.com/brutasse/django-push/pull/28#issuecomment-1833349180

• [X] Documentation End user documentation: https://django-push.readthedocs.io/en/latest/ Contributor docs exist and all other technical documentation can be added if needed.

• [X] Tests Using tox and GitHub actions added in this PR: https://github.com/brutasse/django-push/pull/28

• [ ] Conduct Agreed and added here: https://github.com/brutasse/django-push/pull/30

• [ ] Contributor Guidelines CONTRIBUTING.rst added here: https://github.com/brutasse/django-push/pull/30

• [ ] Badges Added here: https://github.com/brutasse/django-push/pull/30

[sarahboyce]

Was given advice to create an issue in the help repo: https://github.com/jazzband/help/issues/351