tribalfs/oneui-design ? reverse-engineered prompt

Build me an Android design library that helps apps look like Samsung OneUI 8, 7, and 6, and make it feel polished and easy to use in a real project.

I want the library to include a good set of custom UI components and theme support so developers can drop it into an app and get the OneUI look without a lot of extra work. Please also include a sample app that showcases the widgets and shows the right way to set up the theme and app metadata so the color palette works properly on supported devices.

Make it simple for someone to add it to their app, with clear setup steps and a working example I can run right away. If anything depends on current docs or updated setup details, please look them up online and keep the implementation aligned with the latest guidance.