Add release notes for Review Board 5.0.
Review Request #12660 — Created Sept. 30, 2022 and submitted
This is a large release, moving onto modern architecture, and
introducing many new features for reviewers and administrators. This
includes Stale Ship-It! indicators, Trojan Source detection, Single
Sign-On, and more.This change adds release notes covering all the public changes we want
to advertise for the release.This lacks screenshots, but the plan is to add them in a follow-up
change.
Built the release notes. Checked for spelling errors, bad links, and
build errors.