Clear and concise description of the problem

UnoCSS supports intrinsic-size-{size} for contain-intrinsic-size: {size}.

This is a limited access to that CSS feature, as "-size" defines both the width and height.
It's useful to specify the intrinsic size in a single direction only; having width and height variants feel natural and consistent with other size properties.

Suggested solution

Add support for
intrinsic-w-{size} --> contain-intrinsic-width: {size}
intrinsic-h-{size} --> contain-intrinsic-height: {size}

Maybe also -inline- and -block- for exhaustiveness? margin- has them for example.

Alternative

Users define their own rules

Additional context

https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/contain-intrinsic-width

Validations

• Read the Contributing Guidelines.
• Read the README.md of using the package.
• Already used the Interactive Docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.