Use CLAP generate for autogeneration of Nargo command reference

[signorecello]

Noir already uses CLAP for the CLI info. It should be fairly easy to to use it for autogen docs as well, which would increase reliability and reduce time needed to manually update Nargo commands reference 🥇

[signorecello]

@TomAFrench opened a PR in noir-lang to address this, checking if this is ongoing or stale but most likely this is being actively worked on

[signorecello]

moving to blocked even though it's not blocked, just on hold for now until I figure out who will own this