[v4] Dynamic classes support

[daniesy]

I'm building an HTML editor with Tailwind support. The editor should allow my users to add any Tailwind class at runtime. Tailwind scans the source code and generates CSS based on the classes used. In my case, the classes are used later and, therefore, are not included in the CSS file.

At the moment, I'm using an iframe and loading Tailwind through the CDN. However, this is less than optimal, and I have many problems bundling the iframe src code with vite.

Do you have any idea how to optimize this process?