Nomad changes

docs/snippets/dart/plugins/plugin_testing.md

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+<!-- snippet:skip reason="Testing Dart plugins via package:test is not practical because test closure capture varies by test framework; test via integration after registration or via Rust unit tests." -->
+```dart title="Dart"
+import 'package:kreuzberg/kreuzberg.dart';
+
+Future<void> main() async {
+  // Plugin testing with Dart is different from Rust. Dart plugins cannot be
+  // unit-tested in isolation because the registration mechanism uses closures
+  // captured in the plugin factory, and test framework async contexts vary.
+  //
+  // Recommended approaches:
+  // 1. Test core plugin logic directly in unit tests with mock data
+  // 2. Write integration tests that register the plugin and exercise it via
+  //    KreuzbergBridge.extractFile or other extraction methods
+  // 3. For complex plugins, implement in Rust and test with #[tokio::test]
+}
+```