Create a "default" set of game rules

[arqalite]

Rummy has as many variations as there are cultures in the world, each with its own rules and quirks.

The app aims to be as inclusive as possible, so we have a goal to support as many variations of the game as possible.
However there needs to be a "default" that the app will automatically configure when the game starts.

As of v0.1, the game defaults to Romanian Tile Rummy rules, with a maximum of 4 players and a max score of 1000.
Given that this is a personal project, I believe it's best to keep Romanian Tile Rummy as the default, but there is still work to be done.

• Add a wiki page for Romanian Tile Rummy, describing the complete rules of the game. #50
• Add a "help" button in the app, detailing these same rules (for now; in the future we aim to have a library of multiple variations, and their rules should be accessible from the app), so newcomers to the app know what is currently supported. #51