[Feature] `prefixedOnly` for attributify

[hrishikesh-k]

Hi!

I recently discovered this option in UnoCSS: https://github.com/unocss/unocss/tree/main/packages/preset-attributify/#properties-conflicts, and was wondering if it's possible to port this option to WindiCSS too.

The reason being, I've some attributes like:

<div
  w-border = "rounded-md">
</div>

I can see that, in the generated CSS file, I get:

.rounded-md {
  border-radius: .375rem
}
[w-border~=rounded-md] {
  border-radius: .375rem
}

This is just one example, but there are a few more utilities having this problem.

I believe that's happening because rounded-md can also be used as a class name. This can possibly be avoided by providing the above option. Is it possible?