Let's enable using Blueprints v2 and Data Liberation importers via wp-cli. They're built in a generic way that should combine well with any runner.

@zaerl already explored running the Data Liberation importer in this PR WordPress/wordpress-playground#2104

Other useful commands could be:

• Apply a Blueprint to an existing site
• Import a directory / url / anything supported by create-wp-site
• ... what else ? ...
• Create a new WordPress site from a Blueprint (maybe as a wp blueprint command that would just passthrough everything into the blueprints.phar runner?)