Fix phpstan issues in DomainCommands

1. Added dependency injection in Drush commands
2. Moved drush commands to the Drush\Commands namespace, removing the need for a drush services file
3. Removed the phpstan baseline

Removed references to drush services files from composer.json

I have merged the rebased feature branch, since the automatic rebase in gitlab failed.

Thanks @idebr for working on it.

webflo → closed merge request !98

I think domain_source should not extend the DomainCommands class of domain, this will register the commands multiple times. But this was already the case before, we can solve it in another issue.

Automatically closed - issue fixed for 2 weeks with no activity.