A way to use pytest-timeout

[nathanjmcdougall]

Motivation
pytest-timeout is a nice plugin, especially for CI, to avoid tests which take too long.

Should:

• Install the dep
• Add the pyproject.toml config
  Probably a simple as that.

The tricky question is the best interface. a --timeout=60 flag to usethis tool pytest is tempting. Arguably some timeout as a default is a good idea though. More thought needed on this one. A similar approach might be taken for other extensions e.g. pytest-emoji.

On the one hand, it's probably quite aggressive to install tons of (mostly overkill) pytest plugins. On the other hand, things that support best practice are good. I think a flag is probably the best balance but again; more thought needed.

Summary of desired enhancement
Implement a way to add pytest-timeout to a project.