Integrate Cypress as an E2E testing framework

[angelocordon]

Adding e2e tests should help test out our React components as a whole; currently unit testing React is a bit weird as we're relying on DOM rendering; Writing some BDD tests on how our UI is suppose to function and work should help lower manual QA and solidify feature specs.

See: https://www.cypress.io/

[sebbel]

I can tackle this.

[angelocordon]

Awesome! Thanks for tackling!