Poisoned by terrain

This is a trait that replaces the PoisonedByTiberium trait for a more general approach, this now not only works on resources but also on terrain, have a unit that cant live on anything but tiberium add Clear and Beach to the Terrain variable (you might need to add Rough too but I have no idea what terrain that is).
This isn't so simple.
A foundation can be larger than 1x1 while actors (currently) only occupy a single cell.

All cells need to be checked for terrain types.