Allow special rooms to generate in place of the curse room in Greed Mode.
This includes all the special rooms that can generate outside of Greed Mode: Arcades, Vaults, Challenge Rooms, Sacrifice Rooms, Libraries, Isaac's Room/Barren Room, Chest Rooms, Dice Rooms, and Planetariums.
Partially based on kittenchilly's own version at https://github.com/kittenchilly/GreedModeSpecialRooms , though about 80% of the code from there has been rewritten at this point.
COMPATIBLE WITH: Alt path in Greed Mode! Tainted Treasures! Greed Mode Improved!
Workshop page: https://steamcommunity.com/sharedfiles/filedetails/?id=2838468961