Move getFactorioLocale to the new lib/factorio namespace and refactor it
to use async functions instead of callbacks. Split tests into
integration with factorio and testing of the function itself.
Also removes the cacheing from the function itself as this breaks the
isolated testing of it.
Break out the server process management to a new FactorioServer class in
lib/factorio. This class takes responsibility for managing a factorio
server, communicating with it and handling the stopping of it. It also
replaces the previous effort to do this in lib/factorioServer.
This change also updates the version of rcon-client, and since the
author of it has updated it to use UTF-8 the fork is no longer
necessary. It also removes the messageInterface implementation
in favor of just calling the rcon-client library directly since
this has rate limiting logic built in.
The lib/factorio library is intended to abstract all the interfacing
that happens with Factorio.
Cooldude2606