Implement lane assignment for the bowling area

[trundlr]

Multiple instances of bowling will share the same alley in-game. We should have a system that assigns lanes. This should be easy, but this will ensure our edge cases are covered.

• Assign one lane to each instance
• If an instance is disbanded (all players in the instance leave), the lane is freed up
• If all lanes are full, a bowling instance cannot be created (go to another server, or figure out a better solution?)
• Ensure lanes are properly reset
• Ensure players are spawned in the correct area, and not blocking other players' cameras.

[trundlr]

This is blocked by #4

[DevulTj]

Ideally we should just set these up as different gamemode instances

[DoctorGurke]

yeah each lane should be a gamemode instance with up to 6 players