Support print known deps for a nbb.edn file

[ericdallo]

Is your feature request related to a problem? Please describe.
Yes, this clojure-lsp issue

Describe the solution you'd like
For clojure-lsp we would need both a file to know when to run a command, in this case a nbb.edn would be enough and this PR adds the command nbb --print-classpath which will run bb --config nbb.edn print-deps --format classpath

Describe alternatives you've considered

Additional context
PR coming