[Layout foundations] Audit layouts within components

[yesenia-perezcruz]

Collection of product team needs

Today, our only view is a "Page. "

Issues we're seeing with no layout and structure primitives:

• Form fields span the full-width of a Card instead of matching the size of the expected input
• No easy way to display extensions alongside core admin or launch full-screen

[zecarlostorre]

We had this issue already in the board, @adrianefong I think this is inline with what you're looking at, so I changed the issue title and assigned it to you.

[laurkim]

Closing because we're tracking the work in issue #6901