objectionary/eo ? reverse-engineered prompt

Build me a working EO language toolchain so I can write simple .eo programs, compile them, and run them from the command line.

I want a small example project included too, something like a hello world program, plus a clear way to build it with Maven and try it locally. The language should follow EO’s rules, so no classes, no types, no mutable state, no nulls, and no usual control flow shortcuts. Make sure the parser, printer, runtime, and Maven integration all work together well enough for a basic program to go from source to output.

If anything is unclear, check the current docs online and use the repo structure to wire things up the right way. Keep the setup simple so someone new can clone it, build it, and see it working without a lot of extra steps.