chore: checkpoint before Python removal

vendor/indicatif/examples/long-spinner.rs

@@ -0,0 +1,27 @@
+use std::thread;
+use std::time::Duration;
+
+use indicatif::{ProgressBar, ProgressStyle};
+
+fn main() {
+    let pb = ProgressBar::new_spinner();
+    pb.enable_steady_tick(Duration::from_millis(120));
+    pb.set_style(
+        ProgressStyle::with_template("{spinner:.blue} {msg}")
+            .unwrap()
+            // For more spinners check out the cli-spinners project:
+            // https://github.com/sindresorhus/cli-spinners/blob/master/spinners.json
+            .tick_strings(&[
+                "▹▹▹▹▹",
+                "▸▹▹▹▹",
+                "▹▸▹▹▹",
+                "▹▹▸▹▹",
+                "▹▹▹▸▹",
+                "▹▹▹▹▸",
+                "▪▪▪▪▪",
+            ]),
+    );
+    pb.set_message("Calculating...");
+    thread::sleep(Duration::from_secs(5));
+    pb.finish_with_message("Done");
+}