Rename some of the CSS styles

[A1Liu]

The CSS styles in @robin/toolbox are not all named in useful ways. Ideally the class names should be based on the purpose of the style instead of what it is. I don't know enough about design systems to be able to name them in a way that makes sense. Eventually this will be fixed.

[karimsa]

The use of the property in the name as opposed to purpose makes sense - it is the pattern that tailwind uses, idea being to focus on providing primitives and let the user do the styling bits. Otherwise, we will end up creating a component library.