wip entity deserialization phase 1. Unit test not passing because of globals that assume only one entity manager / game state.

Game/Entity/Entity.h

@@ -10,10 +10,11 @@ struct Entity final
 {
     DECLARE_CLASS()
 
-    EntityID    ID           = 0;
-    Class*      derived_kind = nullptr;
-    DerivedType derived      = nullptr;
-    Vector4     position     = {};
+    EntityID     ID           = 0;
+    const Class* derived_kind = nullptr;
+    DerivedType  derived      = nullptr;
+    Vector4      position     = {};
+    bool         is_dirty     = false;
 };
 
 // Can reinterpret cast to this to have the offset of Base and Kind for any entity
@@ -64,3 +65,7 @@ template <typename EntityType>
 }
 
 void serialize(Archive& ar, NonNullPtr<Entity> entity);
+
+[[nodiscard]] const Class* find_class_by_name(String name);
+
+[[nodiscard]] const Class* resolve_entity_class(uint8 kind, uint32 crc);