crazy eight card game against up to 3 computer players for renpy

At the request of my patreons, I've modified the crazy eight card game to be playable against up to 3 AI players.
Since the game is mainly driven by chance, you can reduce the chance of winning to ~25% by adding more AI players to play against.
Like always, this code is exclusive to my patreons for a while before I post it on my github: https://www.patreon.com/posts/48459941