Add License Count and Consumption information to Org REST API

Customers using annual billing currently have no easy way to automate the auditing of license consumption for their known products.
In order to allow the automation of auditing, and notifications centered directly around the consumption of licenses, I would like to propose that the Org REST API include endpoints to allow this information to be accessed by org admins via scripts.

More specifically, being able to get information regarding the associated sites/products, and the consumed licenses per product would be ideal.