Add Playground/Console Documentation

[dvonthenen]

Proposed changes

Add Playground/Console Documentation. This has been in progress for a couple of weeks, I'm just not super familiar with ELM (the language used for the backend) so the progress is slow.

Context

Why is this change important to you? How would you use it? How can it benefit other users?

Possible Implementation

Not obligatory, but suggest an idea for implementing addition or change

Other information

Anything else we should know? (e.g. detailed explanation, related issues, links for us to have context, eg. stack overflow, codepen, etc)