Implement designs

[kentcdodds]

This is a big task and I don't know whether I'll ever get around to doing it to be honest, but here are the designs for GratiText: https://www.figma.com/design/VMPtWF0xNbKKCoaXoUJddL/Gratitext?node-id=66-1096&t=A7sx8MJcopKpbuN4-0

[kentcdodds]

Work started here: https://github.com/epicweb-dev/gratitext/tree/components