Make console-snake nicer in the sample-bilt-monorepo

[giltayar]

The repository https://github.com/giltayar/sample-bilt-monorepo is a sample monorepo that shows how a Bilt repo works.

It implements the snake game (a very simple one) in the console. But it's really badly implemented:

1. It refreshes badly (with lots of refreshes)
2. It doesn't end the game when the snake collides with itself
3. The snake should wrap when it gets to the borders