odin-lang/Odin ? reverse-engineered prompt

I want you to build and run the Odin programming language from this repo on my machine, and make sure the main compiler build works cleanly. If anything is missing or out of date, check the current docs online and fill in the gaps.

Please get the project into a state where I can compile Odin, run a simple example, and confirm the standard libraries are working. If there are any platform specific issues, fix them as part of the setup so the repo builds smoothly on a normal Windows, Linux, or macOS environment. Also make sure the build instructions are clear enough that someone like me could follow them without guessing.

If you need to improve or add small helper scripts, sample commands, or troubleshooting notes to make the build process reliable, go ahead and do that too.