Design fluid grid system and how to implement it

[HeleenSG]

A fluid grid system allows designers to design components that are responsive. Design choices made within that system should be translatable to manon components. So they can behave as intended.

A technical design is needed.

Thoughts:

• Add the grid system choices to a css file which contains the expected breakpoints.
• Connect these breakpoints to the components through variables. (note, css-variables can not be used within media queries. That's why we use sass. So these need to be sass variables that can be set. I believe sass variables can contain css-variables which means the breakpoints could be set through css-variables within a css file just as we define all other styling choices. But this needs to be tested.)