JSON Schema for config files to use with syntax validator in VS Code

[KevinJW]

I was thinking about the use of YAML editors to edit OCIO config files and I was wondering if we should make a way to generate a JSON Schema https://json-schema.org/ to be able to use https://github.com/redhat-developer/vscode-yaml inside VS Code.

Ideally we'd want to generate the schema rather than hand craft it so that it could be regenerated as and when we add/modify the config file syntax, but given the slow rate of this, I guess it isn't essential.

Kevin