Server Leaderboards

[matthew-robertson]

Is your feature request related to a problem? Please describe.
As a user, I'd like to be able to see who's been activating the bot the most.

Describe the solution you'd like
I'd like a command I can use that will tell me (up to) the top 10 people who have been triggering the bot. This will require recording each infraction in some way. Either by storing infractions in the DB, or by Storing user with a bancount.

Describe alternatives you've considered
This should probably be per ban, but per server could also be accepted.