Currently the only place where we can point our user to the available items in Numbast config is here: 
.
A better documentation + validation is via YAML schema: https://www.asdf-format.org/projects/asdf-standard/en/1.0.1/schemas/yaml_schema.html
The benefit include:
- Code-is-documentation
 
- Tooling support (strictyaml can perform input validation on load)
 
- IDE support (vscode.yaml plugin supports dev-time warning/error message by associating with a schema)