add exclusion zone via zeus module

[Fusselwurm]

depends on ZEN which lets you add area markers as Zeus.

as Zeus

• create area marker using ZEN module (look in "Misc")
• select the GRAD_CIVS "ADD EXCLUSION ZONE" module and click somewher within the area you just created
• DONE! no new civs will spawn in that area or create waypoints there

note: we cannot click on the area marker, b/c ZEN has registered the click handler for opening a dialog

note: as we're storing a reference to the area itself, you can edit the area using ZEN and the exclusion zone will change with it.

[Fusselwurm]

edit: ugh, locality issues with this:

• first, need to make it global (easy, publicVariable the exclusion zone)
• but also: ZEN areaMarkers have global visbility, so... meh, not what we want.
  • one solution: add exclusion zone not as marker reference, but from area -> zeus can delete ther marker afterwards. still ugly af and confusing to players

[Fusselwurm]

workaround zen-mod/ZEN#342