Make a template from the generated `cookiecutter` project so that people can one-click use

[paddyroddy]

What needs to be done?

I was discussing with someone at Collaborations Workshop their desire to generate a GitHub repository from a GitHub template without having to then edit all the hardcoded things such as a Python package name (see https://github.com/orgs/community/discussions/5336). This might be nice to really reduce the barrier to entry for some users as there would be fewer instructions to set up. They found this blog post which documents a 'self-rewriting' repository.