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: use make

*.sr.ht: Enable prometheus multiprocessing mode

builds.sr.ht: upgrade to 0.70.12

builds.sr.ht: correct binary name

builds.sr.ht: cd builddir?

builds.sr.ht: fix use of $subpkgdir

builds.sr.ht: add -api

builds.sr.ht: upgrade to 0.66.4

builds.sr.ht: new dependency

*.sr.ht: move nginx files

builds.sr.ht: roll back arch changes

I forgot that our repository is not set up to handle multi-arch yet

builds.sr.ht-nginx: add sr.ht-nginx dependency

builds.sr.ht: add -nginx subpackage

builds.sr.ht: overhaul init files

builds.sr.ht: normalize worker initd

builds.sr.ht: bump pkgrel

sr.ht/builds.sr.ht: update to 0.52.4

builds.sr.ht: add post-upgrade

Fix builds.sr.ht init script logs