Merge branch 'master' into issue53

apps/official/BiscuIT-App-Chronos

apps/official/BiscuIT-App-Exlibris

apps/official/BiscuIT-App-SchILD-NRW

apps/official/BiscuIT-App-Untis

biscuit/core/forms.py

biscuit/core/menus.py

biscuit/core/migrations/0015_person_photo_crop.py

biscuit/core/models.py

biscuit/core/settings.py

biscuit/core/static/bootstrap_modified.scss

biscuit/core/templates/core/edit_person.html

biscuit/core/templates/core/person_card.html

biscuit/core/templates/core/person_full.html

biscuit/core/views.py

pyproject.toml