Rate limit handling

[Kio-td]

So; Misskey doesn't like to tell what happens to a user until after they were given a ratelimit. That's a problem, because it can mean that at any point, the server can just give up; and Cardboard isn't smart enough (yet) to detect that ratelimit and wait for it to pass before sending commands to misskey again.

The idea is most likely to make all commands enter a queue that Cardboard will work through, and will only delete the command when it's been completed; then if hit with a ratelimit, it'll emit a event and will sleep until the ratelimit has been passed before sending more notes.

[Kio-td]

Stalled, see https://activitypub.software/TransFem-org/Sharkey/-/issues/592