feat: Rooms

[Rushwind13]

• tracking rooms and hallways as they are created
• player cannot spawn onto (but can walk over) stairs
• fixed crash bug in item creation (items can't be created on stairs, but player was spawned on stairs)
• Note that the bug would only happen in tests where I am trying to spawn items directly under the player
• null armor for Pickup() in case no pItem in the spot
• added JRect.Edges() because that gets used a lot