Create docs version of auspice config schema

[joverlee521]

Create docs version of the auspice config schema so that users can easily find all available configuration options for auspice.

We would want to auto-generate this from the schema so that the docs don't get out of sync. sphinx-jsonschema seems like a good option with one caveat:

only tested it for use with the draft 4 specification of JSON Schema.

[jameshadfield]

Duplicate of #1056 (or, more precisely, #1056 is a duplicate of this)