docs: add <details> to the CONTRIBUTING.md to make some content visually shorter

[CommanderStorm]

During editing the contribution guide, I noticed that some parts of the contribution guide are likely not immediately necessary for all users. Let's hide some content (where it makes sense).

Rendered

What do you think about this?

[obi1kenobi]

Thanks for suggesting it, it's a good idea!

Details sections have a tendency to be "not obviously clickable" when considering a broad range of contributor skill levels, which in turn makes the contributing doc less contributor-friendly. I think with small tweaks, we can largely avoid this risk and end up with a better contributing file.

I don't like hiding the test output since it's necessary for people to see. I'd prefer we leave that out of a details section.

I'm open to using details blocks to hide the two troubleshooting items, but I'd prefer to add (click to expand) at the end of the summary line so as to minimize the risk of people not knowing how to use them.

[CommanderStorm]

Reasonable, have changed as suggested ^^

[obi1kenobi]

Thank you!