Reader: support aborting a read

[mfulton26]

e.g. I want to be able to read bytes on a TCP socket connection and await more bytes for N milliseconds before processing those received bytes.

see also #10181

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[mfulton26]

Keep alive

[joe-hx]

Adding support for the request as I would like to be able to abort a read on a piped Deno.Process.stdout.

[HurricanKai]

Another usage example for this would be reading from stdin with cancellation. Useful when asking for user input optionally.

[f-zl]

Sorry to bother, but is it possible to timeout a TCP read, other than using setTimeout to close the connection?