appview/pages: show README files in tree listings
We have README files displayed on the main page of a repository, but we
don't do that on subfolders.
Since xrpc was added, we can call it for every file in the list of
potential README file names and pick out if any are present in the
directory we're listing out
Signed-off-by: Skyler Grey <minion@freshlybakedca.ke>
authored by