Exclude primitive and enum types from intrinsic policy

Added checks to filter out primitive and enum types in the intrinsic type policy, ensuring only appropriate types are considered for serialization.

Author: mackysoft

Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/IIntrinsicTypePolicy.cs

@@ -18,6 +18,8 @@ public bool IsAllowed (Type candiateType)
                 (candiateType.IsPublic || candiateType.IsNestedPublic || candiateType.IsNestedPrivate) &&
                 !candiateType.IsAbstract &&
                 !candiateType.IsGenericType &&
+                !candiateType.IsPrimitive &&
+                !candiateType.IsEnum &&
                 !typeof(UnityEngine.Object).IsAssignableFrom(candiateType) &&
                 Attribute.IsDefined(candiateType, typeof(SerializableAttribute)) &&
                 !Attribute.IsDefined(candiateType, typeof(HideInTypeMenuAttribute));