Add emoji to Reddit integration

[hollomancer]

Tagging a thread with the Reddit emoji cross-posts it to Reddit? Need to understand this better

[rickr]

I don't think tagging a whole thread is particularly useful. A good first pass will be the ability to do this to a single message.

For this ticket:

• [ ] Identify an emoji to use (reddit logo?)
• [ ] Subscribe to the reaction_added event: https://api.slack.com/events/reaction_added
• [ ] On receipt of that event check if our special emoji has been received
• [ ] If yes make an API call to reddit's submit endpoint: https://www.reddit.com/dev/api/#POST_api_submit

The link posted should be of type text and contain:

• [ ] The user who made the comment
• [ ] The user who submitted to reddit
• [ ] The contents of the message
• [ ] If possible a link to the message (accessible via slacks archive)

[rickr]

Reddit participation seems pretty quiet. @hollomancer do we still want this feature?

[rickr]

We'll get something similar once we integrate destalinator so I'm closing this out.