Add `hasVoted()` function for comment

[engram-design]

Similar to hasFlagged() we want to know when a user has already voted on a comment.

[pimago]

Hi, does something like this exist now? Or is there a good workaround for it?

[engram-design]

Not implemented currently, but you can handle this logic yourself.

$hasDownVoted = Comments::$plugin->getVotes()->hasDownVoted($comment, $user);
$hasUpVoted = Comments::$plugin->getVotes()->hasUpVoted($comment, $user);