To the main application, add an input thread that "simply" reads
sys.stdin events and transmits them via core.input.
Additionally, set up some initial logging (yeah, for threading, this is
needed immediately)
Add a (half-finished) input library, that for now simply allows
registration and triggering of events.
As next steps, the trigger will happen as part of a separate thread that
reads input events.
Additionally, invoking commands via a execute() will be supported.
Thirdly, there is need of a way to selectively update the affected
modules (widgets), which should be possible given that the event
contains both the instance (widget ID) and name (module name).
