Gateway destinations (#21040)

* Gateway generation

* Gateway stuff

* gatewehs

* mercenaries

* play area

* Range fixes and tweaks

* weh

* Gateway UI polish

* Lots of fixes

* Knock some items off

* Fix dungeon spawning

Realistically we should probably be using a salvage job.

* wahwah

* wehvs

* expression

* weh

* eee

* a

* a

* WEH

* frfr

* Gatwey

* Fix gateway windows

* Fix gateway windows

* a

* a

* Better layer masking

* a

* a

* Noise fixes

* a

* Fix fractal calculations

* a

* More fixes

* Fixes

* Add layers back in

* Fixes

* namespaces and ftl

* Other TODO

* Fix distance

* Cleanup

* Fix test

Content.Shared/Parallax/Biomes/Markers/IBiomeMarkerLayer.cs

@@ -11,9 +11,9 @@ public interface IBiomeMarkerLayer : IPrototype
     /// <summary>
     /// Biome template to use as a mask for this layer.
     /// </summary>
-    public string? EntityMask { get; }
+    public Dictionary<EntProtoId, EntProtoId> EntityMask { get; }
 
-    public string Prototype { get; }
+    public string? Prototype { get; }
 
     /// <summary>
     /// How large the pre-generated points area is.