flutter-ml/google_ml_kit_flutter ? reverse-engineered prompt

Build me a Flutter plugin package that lets apps use Google ML Kit features on Android and iPhone.

I want a clean set of reusable plugins for the common vision tools like barcode scanning, face detection, text recognition, image labeling, object tracking, pose detection, selfie and subject segmentation, digital ink recognition, and document scanning, plus the natural language tools if they’re part of the project. Make it feel easy to use from a normal Flutter app, with simple examples and clear setup instructions.

Please make sure the package structure is organized for multiple plugins, with good docs, basic tests, and working sample usage where it makes sense. Keep the API straightforward for developers who just want to pass in an image and get results back. If anything in the current ML Kit docs has changed, look up the latest guidance online and follow that.