Feature request: generate VO service responses?

I am aware that this feature request is rather big, but would it be possible for `pyvo` to provide a reference implementation for creating `Cone Search`, `SIAP` and `SSAP` server responses?

Background: I am creating a simple Python (Flask) app to expose data from a small survey through a REST API. I would prefer to adopt the VO protocols, but the time I can afford to spend on this project is very limited (~1 week), and so I feel tempted to provide my own quick & dirty API rather than ensuring standard compliance. (Boo myself!)

The situation would be different if there was a reference implementation for VO protocols in Python. For example, I imagine a module which would be able to convert an `astropy.Table` object (i.e. the data) plus some simple `ConeSearchRequest` object into a standard-compliant response string.

Is this something that might fall within the scope of `pyvo`?

No files, tests, or entry points are named. Start by reviewing pyvo's existing support for Cone Search, SIAP, and SSAP and the scope of server-side response generation. Done would require an agreed reference implementation that converts table data and request objects into standard-compliant responses.

Written by the indexing model from the issue text.