msggen: add commando, commando-rune, commando-listrunes, commando-blacklist methods

[daywalker90]

this adds:

• commando
• commando-rune
• commando-listrunes
• commando-blacklist

But they are incomplete. Missing fields because of OneOf complexity in the schemas:

• Commando.params, unsure what do here since object can't know what fields it will have and array would require all positional args to be present if i understand this correctly
• CommandoResponse how to define the response of this command?
• Commando-rune.restrictions is either a string or an array of an array of strings. Can this be simplified to just an array of strings?

[rustyrussell]

These are deprecated except for commando itself.

Commando is recursive, though, which makes this difficult to define!

[ShahanaFarooqui]

Closing in favour of PR #7209.