devtools/docs/contributor/contributing.md described getting code into
the repository as three links: find-bugs.md, fixing-bugs.md and
making-prs.md, under a ./contributing/ directory that does not exist.
They built to href="#./contributing/find-bugs.md", so the whole "Help
with code" path silently went nowhere. Sphinx does not warn about it
because a "#" fragment looks like a local anchor.
Point the three steps at the general documentation instead, which is
what contributor/index.md already tells readers to do: it says this
section "only contains technical information specific to Firefox
DevTools". Note that DevTools patches go to #devtools-reviewers.
bugs-issues.md still split bugs across mozilla-central and the
devtools-html GitHub organisation. All DevTools code lives in
mozilla-central now, so drop the dead organisation search links and
point at filing-good-bugs for how to write an actionable report.
For bugs to work on, point at the DevTools project on Codetribute
rather than firefox-dev.tools, which no longer lists bugs itself.
Differential Revision: https://phabricator.services.mozilla.com/D318454