Dark Mode #356

Summary 💡

Dark Mode

First of: Thx for this testing library/extensions - the docs are well written, the browser extension hugely helpfully and smartly designed queries well explained. The only thing I miss as a developer, is a full dark mode. As the white background does get quite annoying at times.

Happy to help add this if you can provide some guidance.

Examples 🌈

A full dark background, no flashing white elements.

Motivation 🔦

Good DX.