Option for 6 player group rotations for Leagues

Currently, league player group rotations only support groups of 4 or 5 players. There is no option to allow a 6-player group. In real league scenarios, attendance often fluctuates, and there are times when too many or too few players opt in for a given session. When this happens, we are forced to have a player sit out because the system cannot generate a valid rotation beyond groups of 4 or 5.

Adding an option to support 6-player groups would provide much-needed flexibility, reduce unnecessary sit-outs, and allow leagues to accommodate varying attendance more smoothly. This would improve the overall player experience and make league management more efficient