Refactor runners

This PR refactors the runners in order to put them all inside tomo.scan.

This cleans up the imports expected by each of them.

This PR is a kind of huge copy paste. It is pretty safe.

The only real change is the import of the ALIASES from current_session, which loops to be better for my type validator.

I have also updated to version to 2.4.0. This should not change anything.