Two ways to invoke a Rust single-file package from `Scripts.toml`:
```bash
cd examples/cargo-scripts
cargo script greet
cargo script report # uses default title
cargo script report "My Title" # positional
cargo script report title="Hi" # named
```
Requires either a stable cargo with `cargo script` (RFC 3502, lands ~2026)
or a nightly toolchain (`rustup toolchain install nightly`). cargo-run
detects which is available automatically.