Nomad changes

docs/snippets/swift/config/pdf_hierarchy_config.md

@@ -0,0 +1,24 @@
+```swift title="Swift"
+import Foundation
+import Kreuzberg
+import RustBridge
+
+let configJson = """
+{
+    "pdf_options": {
+        "hierarchy": {
+            "enabled": true,
+            "detection_threshold": 0.75,
+            "ocr_coverage_threshold": 0.8,
+            "min_level": 1,
+            "max_level": 5
+        }
+    }
+}
+"""
+
+let config = try extractionConfigFromJson(configJson)
+let result = try extractFileSync("document.pdf", nil, config)
+
+print("Content length: \(result.content().toString().count)")
+```