Create a unified Glide platform API spec

[shayfrendt]

Ensure we have clear organization and facilities to produce a singular Glide API interface/docs via whatever federated services we want to call into.

[shayfrendt]

@rwdaigle @chkn Could we collaborate on this?

Would love to make it really easy for engineers to add new API endpoints in a standardized fashion. We need some code organization investments here according to @cif.