Box primitive

[jsardid]

Implement a Box Primitive component. Since this is a primitive component, it shouldn't bring any design opinion with it, other than maybe restrict some prop values to Design System tokens. For this reason, this component should be used carefully, especially once we have higher-level layout components or patterns.

This box component should allow background color customization via props, and will use the background provider internally. Once built, we should be able to deprecate this provider since nobody should need to use a custom div ever again.

Examples:
Braid: https://seek-oss.github.io/braid-design-system/components/Box
Twilio: https://paste.twilio.design/primitives/box