Command Queue on Cooldown

Queue for commands to prevent spam-lock

something like this -> https://stackoverflow.com/a/899133

I don't think we need to convert to promises. I think we can just store in an array?

https://github.com/caolan/async#queue??

We should implement a cooldown first before queueing

We could mix in this cooldown -> https://stackoverflow.com/questions/48432102/discord-js-cooldown-for-a-command-for-each-user-not-all-users

No files, tests, or entry points are named. Start by locating command handling, then clarify the cooldown and queue behavior, including per-user scope, before defining tests that show spam is prevented and queued commands are processed correctly.

Written by the indexing model from the issue text.