chore: checkpoint before Python removal

vendor/clap/examples/tutorial_builder/02_crate.rs

@@ -0,0 +1,18 @@
+use clap::{arg, command};
+
+fn main() {
+    // requires `cargo` feature, reading name, version, author, and description from `Cargo.toml`
+    let matches = command!()
+        .arg(arg!(--two <VALUE>).required(true))
+        .arg(arg!(--one <VALUE>).required(true))
+        .get_matches();
+
+    println!(
+        "two: {:?}",
+        matches.get_one::<String>("two").expect("required")
+    );
+    println!(
+        "one: {:?}",
+        matches.get_one::<String>("one").expect("required")
+    );
+}