Update the contributing guide

[17cupsofcoffee]

🖼️ Rendered

I had some free time today, so I've had a stab at updating the contributing guide to line up with our new process/rules. I think I've included everything from the coordination issue guidelines (plus a few things that had been missed off).

I also tried to condense the instructions down a bit so that they're a bit easier to follow and focus on the info people need to contribute sections. I've moved the bits focusing on the process into a new section, and added a bit more info on what we do as the editors.

Let me know what you think, happy to tweak if you think anything's been lost in translation :)

[Keavon]

Would this be a good place to propose we get rid of the nonsensical linter requirement for a line length limit in markdown files? It's
seriously quite a pain and provides no benefit.

[17cupsofcoffee]

@Keavon I'm not particularly attached to the line length limit (and if we do keep it, it might make sense to bump it up to 120 characters or something like that), but will see what the other maintainers think.

[Keavon]

Since 120 characters is shorter than a paragraph, that wouldn't really be an improvement. Let's stick to proposing no limit.

[ozkriff]

Would this be a good place to propose we get rid of the nonsensical linter requirement for a line length limit in markdown files?

@Keavon this PR doesn't change the current guidelines, it just tries to document them. I've created a separate issue for line length discussion: #639

[ozkriff]

👍 much shorter and still includes all the important stuff

[17cupsofcoffee]

Cool, I'll merge this in a few hours if there's no objections? Would be good to be able to link to this in the next co-ordination issue.

Will make further edits if the consensus on #639 ends up being to remove the line length limits 👍