Refactor serialization copying to use source generators (#19412)

Content.Server/Holiday/Christmas/LimitedItemGiverComponent.cs

@@ -8,7 +8,7 @@ namespace Content.Server.Holiday.Christmas;
 /// This is used for granting items to lucky souls, exactly once.
 /// </summary>
 [RegisterComponent, Access(typeof(LimitedItemGiverSystem))]
-public sealed class LimitedItemGiverComponent : Component
+public sealed partial class LimitedItemGiverComponent : Component
 {
     /// <summary>
     /// Santa knows who you are behind the screen, only one gift per player per round!

Content.Server/Holiday/Christmas/RandomGiftComponent.cs

@@ -9,7 +9,7 @@ namespace Content.Server.Holiday.Christmas;
 /// This is used for gifts with COMPLETELY random things.
 /// </summary>
 [RegisterComponent, Access(typeof(RandomGiftSystem))]
-public sealed class RandomGiftComponent : Component
+public sealed partial class RandomGiftComponent : Component
 {
     /// <summary>
     /// The wrapper entity to spawn when unwrapping the gift.

Content.Server/Holiday/Christmas/SantaComponent.cs

@@ -4,7 +4,7 @@
 /// This is used as a marker component, allows them to see gift contents.
 /// </summary>
 [RegisterComponent]
-public sealed class SantaComponent : Component
+public sealed partial class SantaComponent : Component
 {
 
 }