NoahKa0/Radium-OS — reverse-engineered prompt

Build me a small hobby operating system called Radium OS in C++. I want it to be a simple learning project that can boot into its own basic environment, show text or graphics on screen, and have the groundwork for file reading and writing, internet, audio, and video support. It doesn’t need to run normal executable programs yet, just make the core OS structure clean and understandable so I can keep learning from it.

Please set it up so it can be built into a bootable ISO with a Makefile, using common Linux tools like g++, binutils, grub, and xorriso. Include a linker script and keep the code organized into include and src folders. Add a short README that explains what the project is, how to clean it, how to build the ISO, and what packages to install on Ubuntu.

Keep the implementation realistic and minimal, not a huge production OS.