[Feature Request] Support icon in breadcrumb item overlay

[meteorlxy]

• [x] I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

https://github.com/vueComponent/ant-design-vue/blob/3003d67c4f537c39c58b135e6103e0572f5f3b6f/components/breadcrumb/Breadcrumb.tsx#L92-L109

When using itemRender to put an icon into the breadcrumb-item, it would also be put inside menu-item of the overlay. As the #icon slot of menu-item is not available in #itemRender scope, the icon style is not correct.

What does the proposed API look like?

I'm not sure how to design the API, but I think we could at least provide a isOverlay arg for itemRender slotProps, so that users could avoid rendering the icon in overlay.

{itemRender({
  route: child,
  params,
  routes,
  paths: addChildPath(tempPaths, child.path, params),
  isOverlay: true,    //  <---- here
})}

--- update

I realized that the isOverlay could be determined by slotProps.routes.includes(slotProps.route), so it might not be necessary.

[tangjinzhou]

you can also use slotProps.route.children && slotProps.route.children.length

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[github-actions[bot]]

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