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-srht: Move bootstrap clone to https protocol

Git protocol has been turned off permanently on March 15th, 2022:
https://github.blog/2021-09-01-improving-git-protocol-security-github/

py3-srht: upgrade to 0.68.14

py3-*: bump pkgrel for python rebuild

py3-srht: bump pkgrel

py3-srht: upgrade to 0.67.13

py3-srht: upgrade to 0.67.0

py3-srht: upgrade to 0.63.5

Use tab

py3-srht: add mistletoe to dependencies

py3-srht: add py3-psycopg2 dependency

We're all in on PostgreSQL now.

py3-srht: add py3-prometheus-client dependency

py3-srht: add html5lib dependency

Add py3-redis to py3-srht dependencies

sr.ht/py3-srht: upgrade to 0.57.2

py3-srht: drop py3-flask-login dependency

py3-srht: it's actually called py3-soupsieve

Add py3-soupselect to py3-srht dependencies

py3-srht, py3-scmsrht: update checksums

Update py3-srht & py3-scmsrht