Configurable ratelimits per challenge category

[jb3]

We should support the addition of configurable ratelimits to challenge categories.

I propose we do this with some sort of natural language input where we intersperse some text with numeric text boxes to take a string in like

After [num] incorrect challenge solves in [num] minutes, time out users for at least [num] minutes plus [num] minutes for every time they have hit cool down on this challenge, until the challenge is solved.

We should definitely make it configurable because as mentioned some categories can be a bit guessy, so OSINT needs a less strict ratelimit. Maybe also try think of some pre-event checks so that we don't allow users to implement insane ratelimits.