recv with timeout

[SpaceCat-Chan]

currently when waiting for a recv, there is no way to interrupt it (probably excluding futures shenanigans most would want to avoid)
this is problematic if (as an example) the user tells the program to quit, then it can't gracefully do that while waiting on a recv.
adding a version of recv with a timeout would mean the task waiting on it can periodically check if it should stop waiting due to other reasons