__package_pip: add extras explorer

The two new explorers detect all installed extras for this package.
3 jobs for feature/__package_pip/extras in 1 minute and 14 seconds (queued for 21 seconds)
Status Job ID Name Coverage
  Test
passed #7852
pycodestyle

00:00:24

passed #7851
shellcheck

00:00:27

passed #7853
unit_tests

00:00:22