Nomad changes

docs/snippets/python/config/document_structure_config.md

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+```python title="Document Structure Config (Python)"
+from kreuzberg import extract_file_sync, ExtractionConfig
+
+# Enable document structure output
+config = ExtractionConfig(include_document_structure=True)
+
+result = extract_file_sync("document.pdf", config=config)
+
+# Access the document tree
+if result.document:
+    for node in result.document["nodes"]:
+        node_type = node["content"]["node_type"]
+        text = node["content"].get("text", "")
+        print(f"[{node_type}] {text[:80]}")
+```