ogre: show issue/pull author in card footer
Replace the footer's leading slot with the author's avatar and handle for
issue and pull request cards. For long handles, ellipsize and drop the
reaction and comment counts to keep the tangled logo visible.
appview/{issues,pulls}: send author info to ogre
Resolve the author's handle and avatar URL from the issue/pull owner DID
and pass them in the payload so ogre can render the author in the card
footer.
Signed-off-by: eti eti@eti.tf