Leverage `schemars` to generate a JSON Schema from our structs for
configurations and those occurring within them.
The output of `rad config schema` can be used by editors to provide a
smoother editing experience for the configuration file. Discovery
attributes (both keys and values) is greatly improved with the schema
helping in the background.
Refer to:
- https://json-schema.org
- https://code.visualstudio.com/docs/languages/json#_json-schemas-and-settings
- https://schemastore.org
n4ch7
cloudhead