More examples

This project has a single example: a simple black jack game. As I don't know many card games (besides poker) I'd might be helpful to add some more simple or complex examples, as well as add helper functions to them. So, here it goes some suggestions:

- [] Add helper function to examples.BlackJack()
- [] Implement a simple game example, like Go Fish or Crazy eight.
- [] Implement BlackJack game to add moves like slipt.

Feel free to tackle parts of the issue instead of generating the whole section at once.

Start by reading the existing examples.BlackJack() implementation and identify how its current game flow and helpers are structured. Choose one suggested scope—an example such as Go Fish or Crazy Eight, a helper for BlackJack, or split moves—and consider it done when that selected example or behavior works consistently with the existing project.

Written by the indexing model from the issue text.