Refactor serialization copying to use source generators (#19412)

Content.Shared/Alert/AlertOrderPrototype.cs

@@ -9,11 +9,11 @@ namespace Content.Shared.Alert
     /// </summary>
     [Prototype("alertOrder")]
     [DataDefinition]
-    public sealed class AlertOrderPrototype : IPrototype, IComparer<AlertPrototype>
+    public sealed partial class AlertOrderPrototype : IPrototype, IComparer<AlertPrototype>
     {
         [ViewVariables]
         [IdDataField]
-        public string ID { get; } = default!;
+        public string ID { get; private set; } = default!;
 
         [DataField("order")]
         private (string type, string alert)[] Order

Content.Shared/Alert/AlertPrototype.cs

@@ -24,7 +24,7 @@ namespace Content.Shared.Alert
         /// minimum and incrementing upwards. If severities are not supported, the first entry is used.
         /// </summary>
         [DataField("icons", required: true)]
-        public readonly List<SpriteSpecifier> Icons = new();
+        public List<SpriteSpecifier> Icons = new();
 
         /// <summary>
         /// Name to show in tooltip window. Accepts formatting.

Content.Shared/Alert/AlertsComponent.cs

@@ -8,7 +8,7 @@ namespace Content.Shared.Alert;
 /// </summary>
 [RegisterComponent]
 [NetworkedComponent]
-public sealed class AlertsComponent : Component
+public sealed partial class AlertsComponent : Component
 {
     [ViewVariables] public Dictionary<AlertKey, AlertState> Alerts = new();