Refactor serialization copying to use source generators (#19412)

Content.Shared/Pinpointer/NavMapComponent.cs

@@ -7,7 +7,7 @@ namespace Content.Shared.Pinpointer;
 /// Used to store grid poly data to be used for UIs.
 /// </summary>
 [RegisterComponent, NetworkedComponent]
-public sealed class NavMapComponent : Component
+public sealed partial class NavMapComponent : Component
 {
     [ViewVariables]
     public readonly Dictionary<Vector2i, NavMapChunk> Chunks = new();