Add a clean flag for the deploy command

[lgdd]

When working with Client Extensions, running deploy can mess with the resources. It seems that the proper way to update a Client Extension is to run a clean deploy instead.

Therefore, it would be practical to have a clean flag to the lfr deploy command (and its shortcut lfr d) to avoid writing lfr x clean deploy.

Being able to have this flag in the configuration (e.g. deploy.clean=true to automatically run the clean arguments when running the deploy command would be a plus. It would be similar to the logs.follow=true that allows to write lfr logs instead of lfr logs -f if we always want to follow logs.