Code formatting using Prettier JS

[mikerodonnell89]

Add prettier js to the library and have it run before commits

[tobi-or-not-tobi]

I recommend to format on save. VS Code provides the following setting:

"editor.formatOnSave": true,

Documentation on this setting: Format a file on save. A formatter must be available, the file must not be auto-saved, and editor must not be shutting down.

Although I typically have this applied as a global setting, we could make this a workspace setting for VS Code users.

Other IDEs have similar things.

[mikerodonnell89]

Here's how to set it up for Webstorm users: https://prettier.io/docs/en/webstorm.html