support github actions fold

[graingert]

https://github.community/t/has-github-action-somthing-like-travis-fold/16841/2

[The-Compiler]

FWIW I'd probably prefer having a separate plugin for that, given that:

• This plugin has a Travis-specific name
• I'm not sure whether it's still maintained (new pytest #8)
• GitHub Actions doesn't support nested folding

[graingert]

@The-Compiler do you think it's worth inducting this into @pytest-dev under a different name?

[abusalimov]

Hi, I don't maintain the project anymore indeed, and I just want to let you know that if you agree on moving the project under the pytest umbrella, I'm totally fine with transferring the ownership of the repo to @The-Compiler or another responsible person. I'm fine with cloning it under a different name too.

[The-Compiler]

I'd personally prefer a more general pytest-github-actions plugin - that could then take care of various other things too. Ideas I have in mind:

• Folding (duh)
• Force enabling colored output by default (No colors by default on GitHub Actions pytest-dev/pytest#7443)
• Install problem matchers (or adjust the pytest output) so that the test failure overview is available as annotations on an actions run (example)

I do have some code lying around for those in qutebrowser, I just haven't had the time to extract everything and package it as a plugin yet...