feat(scenegraph): add basic scene graph data structures

notebooks/verification.py

@@ -0,0 +1,23 @@
+import marimo
+
+__generated_with = "0.21.1"
+app = marimo.App()
+
+
+@app.cell
+def _():
+    import marimo as mo
+    from scenegraph import ObjectNode, RoomNode
+
+
+
+    return
+
+
+@app.cell
+def _():
+    return
+
+
+if __name__ == "__main__":
+    app.run()