termux/termux-packages — reverse-engineered prompt

Build me a package build workspace for Termux, the Android terminal app.

I want it to help maintainers build software packages for Termux in a repeatable way. It should have simple shell scripts to build one package, build everything, and clean up build files. It should support normal packages, root packages, X11 packages, disabled packages, and patches needed for Android or the NDK. A contributor should be able to add a new package recipe, run the build script, and get clear output about what happened.

Please include basic repository metadata, example package files, contribution guidance, and enough documentation so someone new can understand how package management and package building are supposed to work. Keep it practical and close to how an open source Linux package repository would be organized, but focused on Termux. If you need exact current conventions, look up the Termux package docs online.