dhc-tech/flutter-packages ? reverse-engineered prompt

Build me a clean Flutter and Dart package monorepo for a small company’s official reusable tools.

I want it organized so each package can be developed, tested, and published on pub.dev on its own, but still live in one repo with shared docs, scripts, and contribution files. Include packages for an Apple sign in plugin, an attachment handling package, a small command line tool, and a white label kit for app customization. Make sure the repo feels production ready, with good README files, changelog support, licensing, issue tracking, and clear contribution guidance.

I also want the setup to be easy for other developers to maintain, with a simple way to run checks across all packages and keep everything consistent. If anything depends on current Flutter or Dart best practices, look up the latest docs online if you need to.