Would it be better if we just redirected the contribute page to the dev docs?

Probably yes (#18402) but that got tangled up w/ extracting the version independent docs#22866 & this is at least a quick fix

ETA: On#22866, it was waiting on the overhaul of devdocs/ripping out of gitwash, and that's been basically done. I'm trying to more or less close out big changes to the devdocs organization w/#27265 - I still would like to get Noa's triage docs in, but I don't think that's a blocker.

So thinking about broad redirects, should dependencies then be moved out to /install and cross linked? B/c it is version dependent for runtime + building non-editable from source?