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-pygments: upgrade to 2.12.0

Enables clojurescript .cljs syntax highlighting
Changelog: https://pygments.org/docs/changelog/#version-2-12-0

py3-pygments: Hare vaargs updates

Signed-off-by: Sebastian <sebastian@sebsite.pw>

py3-pygments: update Hare string grammar

Signed-off-by: Sebastian <sebastian@sebsite.pw>

py3-*: reset pkgrel

py3-pygments: import from alpine main