Investigate smarter code timeouting without killing the worker

[jolampi]

Blocking infinite loop like

while True:
    pass

prevents the worker from responding to anything. At the moment these situations are handled by killing the whole worker. If these loops could be asyncified (like input() already is) or interrupted by some other means, timeouting could be implemented within the worker itself.

[jolampi]

At least while loops could maybe converted from

while condition:
    # infinite loop

to

while (await check_timeout()) && (condition):
    # infinite loop

where check_timeout() is an asynchronous function call to prevent blocking.