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.

py3-humanize: upgrade to 4.0.0

py3-humanize: upgrade to 3.14.0

py3-*: bump pkgrel for python rebuild

py3-humanize: upgrade to 3.13.1

py3-humanize: upgrade to 3.12.0

py3-humanize: upgrade to 3.11.0

py3-*: bump pkgrel and update upstream versions

py3-humanize: upgrade to 3.10.0

Update all non-sr.ht Python packages

py3-humanize: upgrade to 3.9.0

py3-humanize: upgrade to 3.8.0

py3-humanize: upgrade to 3.7.1

py3-humanize: upgrade to 3.7.0

py3-humanize: upgrade to 3.6.0

py3-humanize: upgrade to 3.5.0

py3-humanize: upgrade to 3.4.1

py3-humanize: upgrade to 3.3.0

py3-humanize: bump pkgrel

py3-humanize: upgrade to 3.2.0