Update docz to v2

[dajohi]

[tiagoalvesdulce]

Blocked by doczjs/docz#1674

[tiagoalvesdulce]

After some time and a lot of attempts to update docz to v2 I decided to move away from it. Will be writing the docs using another generator.

[tiagoalvesdulce]

Docs rewritten using storybook: #428