Use logging.error (nice red display with rich) and hide exception

See merge request mpsd-cs/mpsd-software-environments!25

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

- thinking about end-users
- assumes logging is imported

and technical version with 'debug'

Merge branch 'introduce-logging-module' of gitlab.gwdg.de:mpsd-cs/mpsd-software-environments into introduce-logging-module

continue without error if rich is not installed

- this is the one displayed when log level is `info`
- the more technical version (args) is more to detect a problem in our args to
  string conversion

Move linux-debian11 into main

See merge request mpsd-cs/mpsd-software-environments!19

force `subprocess.run` to check return code is 0

See merge request mpsd-cs/mpsd-software-environments!9