Write script that outputs SCX files

[goto-bus-stop]

It would be nice to also view generated maps in-game. https://github.com/genie-js/genie-scx can not quite generate SCX files yet because awestruct doesn't support the same dynamic stuff for writing as it does for reading. Awestruct likely needs a major version bump to allow that. Then this script should be fairly simple to write (if a bit tedious).