Add MCC custom matchmaking settings

MCC’s matchmaking is a revolutionary system and I can’t for the life of me understand why it wouldn’t be brought forward into Infinite.

The ability to toggle game modes on and off for unranked matchmaking is awesome and should come back asap. Especially if we are going to continue having challenges that require specific modes to play.

Just do 6 or 8 player FFA, 2v2, 4v4, and 12v12 for now. And we can expand to have other player count options over time as new modes roll out.