Do we have any good way of marking delegated authorship in events?

If not, I'll start using the `q` tag to convey this info.

Imagine I post a kind 1 with a quote from a nostrich friend. I could voluntarily use `q: friends_pubkey` and now clients can forward all zaps on that note to them. Like folks do on stacker.news

Same for kind 1063, I could sign an APK while still acknowledging the original author with `q`.

Whatcha think?

#asknostr