Merge branch 'improve-machine-readable-logging' of gitlab.gwdg.de:mpsd-cs/mpsd-software-environments into improve-machine-readable-logging

Revert "Merge branch 'complete-tests-for-run' into 'main'"

See merge request mpsd-cs/mpsd-software-environments!26

This reverts merge request !21

test that the counter works

See merge request mpsd-cs/mpsd-software-environments!21

use rich for logging formatting (if package available)

See merge request mpsd-cs/mpsd-software-environments!23

Simplify implementation of rich

See merge request mpsd-cs/mpsd-software-environments!24

- sys.__stdout__ is the value stdout had at the beginning of the Python program.
- instead, let's reconnect to the stdout stream we used immediately before we
  redirected into the StringIO object. This should be (mildly) more robust.

# Conflicts:
#   mpsd-software-environment.py

Introduce logging module

See merge request mpsd-cs/mpsd-software-environments!22

# Conflicts:
#   mpsd-software-environment.py