Explain shows the declarative schema for a supported resource type or field path.
Run kongctl explain without a path to list every available declarative
resource path. Use text output for human-readable field summaries. Use JSON or
YAML to retrieve the same machine-readable schema.
Lower-maturity resources and operations include a maturity label. Unlabeled
resources are GA. JSON and YAML schema output exposes maturity through
x-kongctl-maturity.