Update contributor guide for JB2

[rossbar]

Minimal updates to the contributor guide to highlight the new JB2 workflow. There's still plenty to be done; my main goal in this PR is to:

1. Remove out-of-date references to myst-nb and jupytext
2. Add a minimal workflow for working with the site locally.

[bsipocz]

Some minor things, but also, I would strongly prefer to not duplicate content but either include the source or directly link out to the rendered page/source code file to minimise diverging instructions/content.

[bsipocz]

You didn't touched the screencaptures in the dropdowns, but I feel those are outdated, too.

[rossbar]

After re-reading the original issue, I realized the question might also be about whether there exist algorithmic approaches that directly target cycles above a minimum length.

Agreed! I think the right way to do it is move this stuff to contributing.md in the main directory then use {include} and/or {embed} directives in the site to dedup the content. This involves splitting/moving files around though so I prefer to do it in a separate PR where the diffs don't contain both moved and changed content.¹

You didn't touched the screencaptures in the dropdowns, but I feel those are outdated, too.

Indeed - I'd like to remove them entirely, but I didn't want to include that in this PR in case it was controversial. The way I see it, those screenshots are more "here's how to use git/github", which I'd like to link to rather than repeat. I still propose to do so in another PR though so it doesn't block this one!

Footnotes

1. I only noticed the duplication after I started working on the content, otherwise I would've done it the other way around 🙃 ↩

[bsipocz]

OK, rendering looks good now, go ahead with merge as is if you like!

[rossbar]

OK, rendering looks good now, go ahead with merge as is if you like!

Thanks @bsipocz ! I will do so so I can start working on the deduplication!

[bsipocz]

pushed a commit to rossbar/numpy-tutorials

@rossbar - we should really turn off these actions on your fork 😅