What problem does this feature solve?

Problem:

• I have an Upload component that has a defaultFileList of images.
• Some of the images have a broken link and the thumbnail being rendered is the default HTML broken image with the alt text. Not very visually pleasing.
• I'd like to render a fallback image instead.
• I'm aware I can use renderItem to handle this but then I would be unable to use the default AntD component listing the files. I would have to create my own component.

What does the proposed API look like?

<Upload
    defaultFileList={[
            {
              fallback: "public/images/fallback.svg",
              uid: "0",
              status: "done",
              name: "filename.svg",
              url: "https://***.com/images/filename.svg",
            },
          ]
    }                          
</Upload>

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