feat: add rust-script

external/rust-script/README.md

@@ -0,0 +1,44 @@
+
+[![CI](https://github.com/fornwall/rust-script/workflows/CI/badge.svg)](https://github.com/fornwall/rust-script/actions?query=workflow%3ACI)
+[![Crates.io](https://img.shields.io/crates/v/rust-script.svg)](https://crates.io/crates/rust-script)
+
+# rust-script
+Run Rust script files without any setup or explicit compilation step, with seamless use of crates specified as dependencies inside the scripts.
+
+```sh
+$ cargo install rust-script
+[...]
+
+$ cat script.rs
+#!/usr/bin/env rust-script
+//! Dependencies can be specified in the script file itself as follows:
+//!
+//! ```cargo
+//! [dependencies]
+//! rand = "0.8.0"
+//! ```
+
+use rand::prelude::*;
+
+fn main() {
+    let x: u64 = random();
+    println!("A random number: {}", x);
+}
+
+$ ./script.rs
+A random number: 9240261453149857564
+```
+
+Rust version 1.54 or newer required.
+
+See the [documentation at rust-script.org](https://rust-script.org).
+
+## Related projects
+- [cargo-script](https://github.com/DanielKeep/cargo-script) - the unmaintained project that `rust-script` was forked from.
+- [cargo-eval](https://github.com/reitermarkus/cargo-eval/) - maintained fork of `cargo-script`.
+- [cargo-play](https://github.com/fanzeyi/cargo-play) - local Rust playground.
+- [runner](https://github.com/stevedonovan/runner/) - tool for running Rust snippets.
+- [scriptisto](https://github.com/igor-petruk/scriptisto) - language-agnostic "shebang interpreter" that enables you to write scripts in compiled languages.
+
+## License
+`rust-script` is primarily distributed under the terms of both the [MIT license](LICENSE-MIT) and the [Apache License (Version 2.0)](LICENSE-APACHE).