Setting the game modes

Steps:

The modes will depend on the mini-games. Just input anything in the modes, and it will tell you which ones are available for that game.

1. /host arena modes add <arenaName> <modeName> Assign a game mode to an arena.

2. /host arena modes remove <arenaName> Remove a mode from an arena.

3. /host arena modes list <arenaName> Show all the modes currently available for an arena.