Add custom schema version to generated documentation

[eeintech]

Hello there,

I am not sure if this feasible, would it be possible to display the custom schema version in the generated doc?

It could go under the title:

And one could set via adding it to the custom schema via schema_version key, example:

$schema: http://json-schema.org/draft-07/schema#
title: My custom schema
description: This is my custom schema, see the version above.
schema_version: 1.0.0

Thanks a lot!