chore: checkpoint before Python removal

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

@@ -0,0 +1,19 @@
+use clap::{Command, arg};
+
+fn main() {
+    let matches = Command::new("MyApp")
+        .version("1.0")
+        .about("Does awesome things")
+        .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")
+    );
+}