Add AI factions (#1807)

* Add NPC faction tags

Some stuff isn't easy to represent by the existence of components so tags are intended to provide that functionality for AI usage.

I was 50/50 on having all tags in the 1 component or splitting it into 2. I'm leaning towards 2. This would be for stuff like say "CanMimic" so the mimic knows it's allowed to look like a specific prototype, or something like "smg" on a gun so it can say smg-specific barks for instance (as currently smgs and pistols look the same from a component perspective).

This also means combat behaviors aren't hardcoded per faction, plus it makes it easy to update faction relations during events.

* Factions command

Update faction relationships via commands.

* Remove command TODO

* Woops

Forgot to commit these items

* Serializer writing and parsing

* linq me up fam

Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>

Content.Client/IgnoredComponents.cs

@@ -162,6 +162,7 @@
             "GasVapor",
             "MobStateManager",
             "Metabolism",
+            "AiFactionTag",
             "PressureProtection",
         };
     }