Fede2782/UN1CA ? reverse-engineered prompt

Build me a working build system for a custom Samsung Galaxy firmware called UN1CA.

I want it to take the needed firmware files, apply the patches and tweaks, and generate a flashable zip for supported devices. It should include the custom One UI improvements mentioned in the README, like the blur toggle, OTA updates app, Play Integrity support, extra CSC features, and the other Samsung enhancements already listed. Please make it easy to run from the command line, and keep the process as automatic as possible so someone can build a release without doing a bunch of manual steps.

If anything needs current upstream docs or external tools, look them up online and use the right versions. Also make sure the scripts are clean, reliable, and easy to understand, since this repo looks like it is meant to be maintained over time.