Add verbosity option (incremental) and use log instead of print

[Guts]

Context

Recently, we faced an issue with the log length using qgis-plugin-ci on GitLab CI/CD:

Job's log exceeded limit of 4194304 bytes.
Job execution will continue but no more output will be collected.

See this job: https://gitlab.com/Oslandia/qgis/ign-geotuileur/-/jobs/3056269109

But I've been thinking for a long time that we should reduce the amount of information returned to the terminal or let the end-user pick.

Changes

STILL IN PROGRESS

• add a verbosity option -v with an incremental count

  # by default, log nothing except print statement = WARNING
  qgis-plugin-ci package latest
  # -v = INFO
  qgis-plugin-ci -v package latest
  # -vv = DEBUG
  qgis-plugin-ci -vv package latest

• add a setting into the setup.cfg to customize log format

• remove option alias -v from the version option to avoid conflict

• improve some exception handling: mainly add Trace: {exc} and use f-string instead of format as recommended

[Gustry]

Nice move !

[3nids]

niiiiice!!!

[Guts]

Thanks for your comments. I've created a clean branch and the corresponding PR: #156 . I close here.