Nomad changes

docs/snippets/php/config/pdf_hierarchy_config.md

@@ -0,0 +1,26 @@
+```php title="PHP"
+<?php
+declare(strict_types=1);
+
+use Kreuzberg\Kreuzberg;
+use Kreuzberg\ExtractionConfig;
+use Kreuzberg\PdfConfig;
+use Kreuzberg\HierarchyConfig;
+
+$config = new ExtractionConfig(
+    pdfOptions: new PdfConfig(
+        hierarchy: new HierarchyConfig(
+            enabled: true,
+            detectionThreshold: 0.75,
+            ocrCoverageThreshold: 0.8,
+            minLevel: 1,
+            maxLevel: 5
+        )
+    )
+);
+
+$result = Kreuzberg::extractFileSync('document.pdf', null, $config);
+
+echo "Hierarchy levels: " . count($result->getHierarchy()) . "\n";
+?>
+```