Test Chromatic for visual testing

[mimarz]

We have had several bugs due to lack of regression visual regression testing. This will just get worse as component library grows and we make a css library.

Investigate on what options we have in this regard.

Notes:

• https://www.chromatic.com/
• https://docusaurus.io/blog/upgrading-frontend-dependencies-with-confidence-using-visual-regression-testing
• https://percy.io/
• https://loki.js.org/

[unekinn]

Since Chromatic is free to get started and I have some experience with it, we're trying it first. The work done in Storybook stories to make visual tests add value is the same regardless of the testing framework.