Nomad changes

docs/snippets/rust/config/document_structure_config.md

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+```rust title="Document Structure Config (Rust)"
+use kreuzberg::{extract_file_sync, ExtractionConfig};
+
+let config = ExtractionConfig {
+    include_document_structure: true,
+    ..Default::default()
+};
+
+let result = extract_file_sync("document.pdf", None, &config)?;
+
+if let Some(document) = &result.document {
+    for node in &document.nodes {
+        let text = node.content.text().unwrap_or("");
+        println!("[{}] {}", node.content.node_type_str(), &text[..text.len().min(80)]);
+    }
+}
+```