Prefetching dependencies

[missmesss]

The text is being reviewed and will probably see a bit of changes.

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[arewm]

The hermetic and prefetch-dependencies comments are relevant in multiple places but I didn't replicate the comment.

Cachi2 also supports yarn and prefetching pip wheels. How complete do we want this documentation vs. just referring to https://github.com/containerbuildsystem/cachi2/blob/main/docs/usage.md ?

[missmesss]

@arewm I've added the changes requested by you but I understand you won't see them before the vacation.

I plan to merge this PR because the changes are quite straightforward (like updating parameters names).

[missmesss]

Cachi2 also supports yarn and prefetching pip wheels. How complete do we want this documentation vs. just referring to https://github.com/containerbuildsystem/cachi2/blob/main/docs/usage.md ?

Thank you for pointing this out.
Usually we aim at not repeating (copypasting) docs that already exist. However, in case of this guide it makes sense to extend it with a section about Yarn. I'll open an issue about it and discuss it with my team.

[missmesss]

Applied all requested changes. Since they're quite straightforward, e.g. changing parameters names, re-review isn't strictly needed, I'm merging this PR.