Q&A channel/system with user submitted questions and answers

[markbeep]

Idea:

Users can add questions to a topic using $qa ask -q "What is an invariant?" -s "AnD" which adds the question (with an id) to an embed message for said topic.

Algorithms & Datastructures (AnD)
What is an invariant? (id: 42)
-(No answer yet)

Then if a user wants to answer it, they can do $qa answer -id 42 -a "It's something obvious."

Algorithms & Datastructures (AnD)
What is an invariant? (id: 42)
-It's something obvious. (@ user)