Include official tailwindcss plugins in the documentation

[chris23lngr]

The new Tailwind v4 documentation contains only a minimal explanation of how to install Tailwind plugins.

I think it might be helpful, especially for new users, to at least provide a list of the official plugins with an explanation (one-liner) of what these plugins are needed for - this is completely missing in the new documentation, in the old one there was at least a small mention.

Even if the JS plugins are outdated, they are often still helpful and deserve a mention (at least in my opinion).