nank1ro/flutter-shadcn-ui ? reverse-engineered prompt

Build me a Flutter UI library that brings the shadcn style to Flutter, with lots of polished, reusable components that are easy to customize.

I want it to include the common app pieces like buttons, cards, dialogs, inputs, selects, tabs, tables, tooltips, toasts, date and time pickers, and other controls that fit a modern app. Make the components look clean and consistent, but keep them flexible so I can restyle them for different apps without fighting the defaults.

Also include a simple demo app and a documentation area where I can see each component in action and copy the code. If there are any tricky parts or current Flutter best practices that help the implementation, look up the latest docs online and use those. Make sure the whole thing feels production ready and easy for other Flutter developers to use.