Nomad changes

docs/snippets/dart/plugins/clear_plugins.md

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+```dart title="Dart"
+import 'package:kreuzberg/kreuzberg.dart';
+
+Future<void> main() async {
+  // The Dart binding exposes bulk-clear entry points for OCR backends,
+  // post-processors, and validators. Document-extractor clearing is not
+  // surfaced through flutter_rust_bridge; the built-in extractors are
+  // registered automatically by the kreuzberg core when the library
+  // initializes.
+  await KreuzbergBridge.clearOcrBackends();
+  await KreuzbergBridge.clearPostProcessors();
+  await KreuzbergBridge.clearValidators();
+
+  print('OCR backends, post-processors, and validators cleared');
+}
+```