Add an API for managing VM and Transit resources

[DragonStuff]

Is your feature request related to a problem? Please describe.
For repeatable infrastructure, where both automated scaling and short lived machines are important factors, an API will greatly improve these pain points.

Describe the solution you'd like
Create an API to programmatically allow listing, creating, editing and deleting resources.

Describe alternatives you've considered
Static host allocation with containers on those hosts. But there’s no “scale up/down automatically” option with that alternative.

Additional context
This may be more useful after Cloud Init is available for automated deployments.