Add "small modal" or "alert modal" to design system

[brandonhaslegs]

Small alerts for small things. Standard UI element we're just missing.

Here's the link to the Figma component https://www.figma.com/file/vyI7f996JF8zwhnXwAwXdC/%F0%9F%92%A7-Drips?type=design&node-id=4024-9608&mode=design&t=k9NCWB1By9fKPLP0-4