ECS refactor: new ComponentSet, serialization, generators

Major ECS API overhaul: added ComponentSet, refactored ComponentRegistry, and updated all entity/component creation methods. Introduced robust custom serialization infrastructure and per-component source generators for registration and (de)serialization. Updated editor, engine, and test code to use new APIs. Improved code quality, naming, and performance throughout. Removed obsolete code and updated dependencies.

Ghost.Entities/ManagedComponent.cs

@@ -24,7 +24,7 @@ public readonly struct Managed<T> : IComponent, IManagedWrapper
 public static class ManagedComponemtnID<T>
     where T : IManagedComponent
 {
-    public static readonly Identifier<IManagedComponent> value = ManagedComponentRegister.GetOrRegisterComponent<T>();
+    public static readonly Identifier<IManagedComponent> value = ManagedComponentRegistry.GetOrRegisterComponent<T>();
 }
 
 internal struct ManagedComponentInfo
@@ -33,7 +33,7 @@ internal struct ManagedComponentInfo
     public bool isScriptComponent;
 }
 
-internal static class ManagedComponentRegister
+internal static class ManagedComponentRegistry
 {
     private static readonly List<ManagedComponentInfo> s_registeredComponents = new();
     private static readonly Dictionary<IntPtr, int> s_typeHandleToID = new();