UI refresh

Implement the refreshed design

note: to get access, first login once (via "OpenID"), then ask @lebihae for an inviation link.

Publicly available link: https://penpot.inpt.fr/#/view/e3cc6c42-b65a-8171-8004-bde7cc0b2e7c?page-id=352e9fc6-6a46-8154-8004-a7c2fa2474d0&section=interactions&index=0&share-id=e3cc6c42-b65a-8171-8004-bec53c480b1e (does not allow editing, but allows commenting without a team inviation once logged-in)