Reshaping repo

The repo is designed for use with an existing builds.sr.ht service.
Besides lacking that, I am more interested in a containerized workflow
powered by a Makefile. Package source code will live in `pkgsrc/`,
packages will be built into `pkg/`, and packaging keys will be
generated into `keys/`.

Alos trimmed the packages down to what I will build.

builds.sr.ht: Add missing initd dependencies

builds.sr.ht: normalize worker initd

Fix builds.sr.ht init script logs

Normalize builds.sr.ht init scripts

Fix EXTRA_ARGS in builds.sr.ht-worker service

Add extra runtime args to builds.sr.ht service

Update builds.sr.ht package

Move into subdir for abuild reasons

Fix up builds.sr.ht package

Fix celery and finish builds.sr.ht package