luna-runtime-helpers

Static-link runtime entry for AOT-produced binaries. Exposes a single C-ABI symbol `luna_aot_run(bytecode, len) -> i32` that constructs a luna `Vm`, `undump`s the embedded bytecode, calls the root chunk, and returns a process exit code. Built as a `staticlib` so `luna-aot`'s `cc` link step can statically pull it (plus rust stdlib) into the produced native binary. Also built as `rlib` so `luna-aot`'s integration tests can drive it via the Rust runtime.