We must to update the outdated planet4 design system page.

For example, the foundation section (specially the variable's section) hasn't added the XXL media query which was implemented in 2021.

Having this page updated it would be very useful not only for developers but also for the rest of the community.

On going file -> https://docs.google.com/spreadsheets/d/1cwtyOYyKkUj_kq_6cdqCBb8iThkUSS6D6AvfN9ywiEU/edit?usp=sharing