knotserver: git: add more fields to NiceDiff.Commit
These should now let us reconstruct the commit object (or at least the
git cat-file equivalent) appview-side.
Signed-off-by: Anirudh Oppiliappan <anirudh@tangled.sh>
authored by
anirudh.fi
and committed by
Tangled
ea1b3729
b08135c8