Add support for Americano game mode

[pedrorijo91]

in https://app.hey.com/topics/1244216559

Hi... We sometimes play in Americano tournament them the scoring changes from 15 points per point to single units like soccer goal points, so each game in tournament each player gets to serve for example 4 times (it can vary sometimes its 6 or even 7 serves for each player), so if each gets 4 serves per game, then the total score will be 16 points, meaning you can win like 10-6. I'm looking for functionality to change from 15 point games to single point games for these tournaments, Here the link to our last tournament https://www.padelution.com/americano/9b834101-82f6-4714-8f31-c38934680078

see more info at https://www.padelution.com/americano

this would probably require to tackle #27 first, and refactor the game logic to have some sort of MatchEngine, SetEngine, GameEngine. which would only be safe to add after checking how to properly implement test #63