Update poll federation

[acid-chicken]

Summary

From mastodon/mastodon#10111 and #3940.

Working at poll branch.

[acid-chicken]

Memo: have to support anyOf choices.

[Gargron]

• anyOf (multiple-choice)
• endTime (expiration date) (closed when already expired)
• For each item in oneOf/anyOf, you can add replies: { type: 'Collection', totalItems: 123 } instead of (or additionally to) _misskey_votes

[acid-chicken]

@Gargron Thank you for the useful info!

[Gargron]

@acid-chicken Perhaps you can help me answer these?

mastodon/mastodon#10111 (comment)
mastodon/mastodon#10111 (comment)

[Gargron]

I have another request... Could you use name to federate poll votes instead of content (or _misskey_content?), so we can avoid HTML and also differentiate between normal replies and votes easier

[acid-chicken]

@Gargron Misskey will start using name property when #4409 is merged!