[Improvement] add functionality make initial project optional to command calm init dsl

[Jose Gomez]

Make optional the need of passing a project when initializing Calm for the first time.

In the previous versions, there was available an initial project called default, but that's not the case anymore and with _internal it cannot be called. If you want to use Calm DSL to just create a bunch of projects with environments as part of the initial setup, you cannot do it until you have created manually a project in the Calm UI first.