Refactor serialization copying to use source generators (#19412)

Content.Client/SurveillanceCamera/SurveillanceCameraVisualsComponent.cs

@@ -5,8 +5,8 @@ namespace Content.Client.SurveillanceCamera;
 // Dummy component so that targetted events work on client for
 // appearance events.
 [RegisterComponent]
-public sealed class SurveillanceCameraVisualsComponent : Component
+public sealed partial class SurveillanceCameraVisualsComponent : Component
 {
     [DataField("sprites")]
-    public readonly Dictionary<SurveillanceCameraVisuals, string> CameraSprites = new();
+    public Dictionary<SurveillanceCameraVisuals, string> CameraSprites = new();
 }