Refactor serialization copying to use source generators (#19412)

Content.Shared/Parallax/Biomes/Layers/IBiomeLayer.cs

@@ -3,7 +3,7 @@ using Robust.Shared.Noise;
 namespace Content.Shared.Parallax.Biomes.Layers;
 
 [ImplicitDataDefinitionForInheritors]
-public interface IBiomeLayer
+public partial interface IBiomeLayer
 {
     /// <summary>
     /// Seed is used an offset from the relevant BiomeComponent's seed.
@@ -19,4 +19,4 @@ public interface IBiomeLayer
     /// Is the thresold inverted so we need to be lower than it.
     /// </summary>
     public bool Invert { get; }
-}
+}