[FEAT]: Enable support for `nox` in the code and documentation testing workflows

### Description

It would be nice to allow users to use either `tox` or `nox` to run their tests. A new workflow input should be added which switches from using `tox` to using `nox`.

See [this article](https://hynek.me/articles/why-i-like-nox/) for a few examples.

### Additional Information

_No response_