New package: pizauth (Command-line OAuth2 authentication daemon)

[dkwo]

This could be a nice alternative to mutt_oauth2.py

• I tested the changes in this PR: tested with google and microsoft, as well as dinit service.
• This new package conforms to the package requirements: yes
• I built this PR locally for my native architecture, (x86_64-glibc)

[dkwo]

Tested the dinit user service as well, with some help from upstream dinit:
mbsync

type = process
env-file = env-var-xdg
command = /usr/bin/snooze -H* -M 5/10 /bin/sh -c "/usr/bin/mbsync -a && /usr/bin/notmuch new"
log-type = buffer
depends-on: pizauth

pizauth

type = scripted
env-file = env-var-xdg
load-options = export-passwd-vars
command = /bin/sh -c "sleep 1; age -d -i ${HOME}/.passage/identities ${XDG_STATE_HOME}/pizauth.age | pizauth restore"
stop-command = /bin/sh -c "pizauth dump | age -e -r ageKEY -o ${XDG_STATE_HOME}/pizauth.age"
log-type = buffer
depends-on: pizauth-daemon

pizauth-daemon

type = process
env-file = env-var-xdg
command = /usr/bin/pizauth server -vvvv -d
stop-command = /usr/bin/pizauth shutdown
log-type = buffer