codex-rs README.md provides NPM instructions

Question

### What is the type of issue?

Documentation is incorrect

### What is the issue?

The README describes how to work with the npm version in nearly all parts and not the rust version. It should include instructions such as:

```bash
cargo build --all
cargo test openai_tools::tests
....
```

It also looks if you did the "basic user thing" of trying to install from the codex-rs folder (e.g. `cargo install --path .`) there's missing manifests.

### Where did you find it?

https://github.com/openai/