Libraries dependencies for media_library

Please open a merge request.

What's the issue exactly though?

If a UI issue the summary should be updated to include before/after screenshots, also proposed solution.

Otherwise the variables in the css like '--vertical-tabs-menu-width' are not defined.

The variable --vertical-tabs-menu-width is defined in the variable.pcss.css file, and it is available globally. So there's no need to add the dependency of claro/vertical-tabs