devel/py-rq1: Add new port, copied from devel/py-rq

RQ (Redis Queue) is a simple Python library for queueing jobs and
processing them in the background with workers. It is backed by Redis
and it is designed to have a low barrier to entry. It can be integrated
in your web stack easily.

This port serves as a transition for consumers of devel/py-rq which are
not yet ready for py-rq 2.0.0.

PR: 282649
Approved by: skreuzer (maintainer)