[ExtendedNetworkImageProvider] use bytesLoader to custom bytes loader

[normalllll]

Custom image bytes loader, it does not support web

[zmtzawqlp]

What is the background of this PR requirement?

[normalllll]

Use non-Dart built-in IO to make network requests, such as using HTTP3 or native to make request, and after/before process the request.

[zmtzawqlp]

Use non-Dart built-in IO to make network requests, such as using HTTP3 or native to make request, and after/before process the request.

is there any introduce or demo to show how to use it for the users?

[normalllll]

ExtendedImage(
      image: ExtendedNetworkImageProvider(
        url,
        cache: true,
        printError: false,
        bytesLoader: (void Function(ImageChunkEvent event) chunkEvent) async {
          return await downloadToMemory(
            url: url,
            progressCallback: (int received, int total) {
              chunkEvent(ImageChunkEvent(cumulativeBytesLoaded: received, expectedTotalBytes: total));
            },
          );
        },
      ),
)