Every issue and patch of a repository shows on its board, in a column
derived from its state until someone moves it. Cards move by drag and
drop or from their menu, closing columns close and reopen issues for
those allowed to, and a drop that isn't allowed says why. Changes wait
2.5 seconds and are written as one op. Patches link to issues with a
keyword and a full reference. Boards stay hidden until turned on under
Settings → Labs.
Co-authored-by: Rūdolfs Ošiņš <rudolfs@osins.org>
