Triggers code refactoring, removed a couple of triggers.

Small tweaks for ACOT.

Updated rules and triggers for Expanded Traits, Civics, Pops, and More.

Not less than eight mods overwrite the ending of Horizon Signal, each doing it differently.
I decided to merge these variations to make it work with whatever combination of mods you might have. The event `akx.10020` which fires if you accept it, is now overwritten by the Merger of Rules to take account for the following mods:
Ariphaos Patch - used as a base for the rewrite
Expanded Traits, Civics, Pops, and More
Giga Diversity
Gigastructural Engineering & More
Madoka Magica
Planetary Diversity
Starborn
Warship Girls R And MIST Species
Plus all the mods that add habitable megastructures and didn't edit the event.

Trigger fix for Starborn.
Adding support for Galaxius.

Updated triggers for Gigastructural Engineering & More.

Updated rules for Expanded Traits, Civics, Pops, and More.
Code updates and tweaks.

Fixed a faulty megastructure trigger.

Added NSC ship ownership limits.

Updated rules for Warship Girls R And MIST Species and Star Wars: Kuat Ancient Empire.
Updated triggers for Gigastructural Engineering & More.