Refactor shorthandInlineCSS

[cossssmin]

This PR:

• refactors shorthandInlineCSS so that it runs after removeUnusedCSS.

  This was necessary because running it before lead to a situation where CSS in body no longer matched that in the head, resulting in stray classes left over.

• adds consistency between shorthand inline CSS (in the body) and compiled Tailwind CSS (like when you write custom CSS like .padded { @apply px-4 py-2; }).

  Compiled Tailwind CSS was always shorthanded as long as you were not developing locally, meaning even when you didn't enable shorthandInlineCSS. This makes them consistent and opens the way to a more generic shorthandCSS option that will replace shorthandInlineCSS in the near future, since it doesn't really make sense to have them separated.

[cossssmin]

Actually went ahead and added support for shorthandCSS too. So you can use that or shorthandInlineCSS, it still works ofc 👍