Byte stream support for FileHandle::readableWebStream

[saschanaz]

What is the problem this feature will solve?

This fails currently:

(await fs.open("./test/animated/87a.gif")).readableWebStream().getReader({mode:'byob'})

Uncaught:
TypeError [ERR_INVALID_ARG_VALUE]: The argument 'stream' must be a byte stream. Received ReadableStream { locked: false, state: 'readable', supportsBYOB: false }
    at __node_internal_captureLargerStackTrace (node:internal/errors:484:5)
    at new NodeError (node:internal/errors:393:5)
    at setupReadableStreamBYOBReader (node:internal/webstreams/readablestream:2127:11)
    at new ReadableStreamBYOBReader (node:internal/webstreams/readablestream:882:5)
    at ReadableStream.getReader (node:internal/webstreams/readablestream:323:12)
    at REPL276:1:96 {
  code: 'ERR_INVALID_ARG_VALUE'
}

But a file is all about bytes and intuitively it should succeed.

What is the feature you are proposing to solve the problem?

Byte stream support for FileHandle::readableWebStream

What alternatives have you considered?

No response

[aduh95]

/cc @nodejs/fs