feat(scaffolding): add Rust package generator

tools/scaffolding/rust_main.rs

@@ -0,0 +1,29 @@
+use std::env;
+use std::io;
+use std::path::PathBuf;
+
+fn main() -> io::Result<()> {
+    let mut arguments = env::args_os();
+    let program = arguments.next().unwrap_or_else(|| "rust_cli".into());
+    let Some(destination) = arguments.next() else {
+        return Err(io::Error::new(
+            io::ErrorKind::InvalidInput,
+            format!("usage: {} <destination>", PathBuf::from(program).display()),
+        ));
+    };
+
+    if destination == "--help" {
+        println!("usage: {} <destination>", PathBuf::from(program).display());
+        return Ok(());
+    }
+    if arguments.next().is_some() {
+        return Err(io::Error::new(
+            io::ErrorKind::InvalidInput,
+            "expected exactly one destination",
+        ));
+    }
+
+    let destination = rust::run(&PathBuf::from(destination))?;
+    println!("created {}", destination.display());
+    Ok(())
+}