Implement `query-cmd-doc`
Add a query-cmd-doc
QMP command to QEMU that is capable of sending QMP help text for a given command to a caller.
This command will necessitate generating the help text into a consumable format by qapi-gen. That generated format MAY be in the form of static data (like introspection data) or it may be in the form of some standalone format (a JSON file?) that QEMU loads on demand. Discussion ongoing. The simplest solution for a first draft is likely the static data form.
References: