LibJS: Implement temporal AO SnapshotOwnProperties

Author: https://github.com/shannonbooth
Commit: d2710ad73f
Pull-request: https://github.com/SerenityOS/serenity/pull/22593
Reviewed-by: https://github.com/ADKaster ✅

Userland/Libraries/LibJS/Runtime/Object.h

@@ -119,6 +119,7 @@ public:
     ThrowCompletionOr<bool> test_integrity_level(IntegrityLevel) const;
     ThrowCompletionOr<MarkedVector<Value>> enumerable_own_property_names(PropertyKind kind) const;
     ThrowCompletionOr<void> copy_data_properties(VM&, Value source, HashTable<PropertyKey> const& excluded_keys, HashTable<JS::Value> const& excluded_values = {});
+    ThrowCompletionOr<NonnullGCPtr<Object>> snapshot_own_properties(VM&, GCPtr<Object> prototype, HashTable<PropertyKey> const& excluded_keys = {}, HashTable<Value> const& excluded_values = {});
 
     PrivateElement* private_element_find(PrivateName const& name);
     ThrowCompletionOr<void> private_field_add(PrivateName const& name, Value value);