We dont want need to maintain duplicate entries for maintainers in HM
that already exist in Nixpkgs. Add a check that calls out users that
don't need an entry in our internal list.
Signed-off-by: Austin Horstman <khaneliman12@gmail.com>
We need to make sure that we don't insert invalid maintainers otherwise
it breaks the RFC39 invite workflow. Check that we have valid nix and
the required attributes are able to be parsed properly.
Signed-off-by: Austin Horstman <khaneliman12@gmail.com>
