fix: refactored manually

app/nodes/__init__.py

@@ -0,0 +1,8 @@
+"""Nodes package."""
+
+from .design_node import design_node
+from .discover_node import discover_node
+from .package_node import package_node
+from .validate_node import validate_node
+
+__all__ = ["discover_node", "design_node", "validate_node", "package_node"]