Add an audio example demonstrating how to play randomized sound effects

## What problem does this solve or what need does it fill?

When working with sound effects in games, audio files should

## What solution would you like?

Core requirements:

1. The player must be able to do something.
2. When a trigger occurs, the sound effect plays.
3. The sound effect is chosen from a pool of random sound effects.

Stretch goals:

1. The player can take multiple actions, and the set of sound effects is structured sensibly to model this.
2. The sound effects are procedurally varied in some way.

## Additional context

You should consider reusing existing sound effects from the repo to save on file size.