add instructions for interaction

[vsoch]

hey @atlaskerr ! Could you add some documentation on how to build / interact with what you've implemented here, so others can mess around with it?

[bsatlas]

Build/interact in what way?

[vsoch]

Assume that I'm a user/developer that stumbled on your repo and I know absolutely nothing (I don't!). I want to play with your code. Walk me through the contents of both "schema" and "openapi" and how I interact / understand them. Is there anything to run or render? What's a libsonnet? How can I look at what you've done any give you an opinion on if I think it's a good idea?

[bsatlas]

That's fair. I'll add a readme to the openapi and schema section after I finish the proposal for submission to OCI.

[vsoch]

Werd! Ping me here when ready and I'll give it a spin.