Complete M11 Creator Studio and M12 Trust & Safety for PC5

- Creator Studio: Visual behavior & property inspector, GLB model importer, binary persistence
- Trust & Safety: 18+ TOS confirmation (DOB removed), creator guidelines & briefing card on join, in-game reporting HUD
- Test Harness: Add --filter, --skip-backend, --skip-godot to run_checkpoint_tests.py

scripts/editor/editor_core.gd

@@ -98,6 +98,14 @@ func scale_object(object_id: String, scale: Vector3) -> bool:
 	return bool(use_tool("transform", {"object_id": object_id, "op": "scale", "value": scale}))
 
 
+func set_object_property(object_id: String, key: String, value: Variant) -> bool:
+	return bool(use_tool("transform", {"object_id": object_id, "op": "property", "key": key, "value": value}))
+
+
+func set_object_behavior(object_id: String, behavior_dict: Dictionary) -> bool:
+	return set_object_property(object_id, "script_behavior", behavior_dict)
+
+
 func select_object(object_id: String) -> bool:
 	return bool(use_tool("select", {"object_id": object_id}))