Avoid creating `<DualScrollSync.NavItem>` button element

[multimeric]

The <DualScrollSync.NavItem> element seems to create a <button> as a child, which some built-in styling:

However most UI framework users like myself would rather have full control over the element and style that is created, as it needs to integrate with the rest of the app.

There are a few ways to mitigate this:

• The asChild approach
• The as approach