Document use of commercial dependencies after marketplace registration

[pyoio]

From outcome actions of https://docs.google.com/document/d/1dIUwuwx-HPxvJiaBTA3iuxmLE76F9duNl9tkbsSaH3w/edit#

Customers subscribing via the marketplaces will be given access to commercial dependencies, we can then prompt them to use TDS and Akka Diagnostics etc...

Future work could include operator automating some useful functionality