Nomad changes

docs/snippets/dart/ocr/cloud_ocr_backend.md

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+```dart title="Dart"
+import 'package:kreuzberg/kreuzberg.dart';
+
+Future<void> main() async {
+  // Cloud OCR backends are registered in the Rust core. From Dart, select a
+  // registered backend by name. Use `KreuzbergBridge.listOcrBackends()` to
+  // discover available backends at runtime.
+  final backends = await KreuzbergBridge.listOcrBackends();
+  print('Available OCR backends: $backends');
+
+  final config = ExtractionConfig(
+    useCache: true,
+    enableQualityProcessing: true,
+    forceOcr: false,
+    disableOcr: false,
+    ocr: const OcrConfig(
+      enabled: true,
+      backend: 'cloud',
+      language: 'en',
+      autoRotate: false,
+    ),
+    resultFormat: ResultFormat.unified,
+    outputFormat: OutputFormat.plain(),
+    includeDocumentStructure: false,
+    maxArchiveDepth: 3,
+    useLayoutForMarkdown: false,
+  );
+
+  final result = await KreuzbergBridge.extractFile('scanned.pdf', null, config);
+  print(result.content);
+}
+```