chore: checkpoint before Python removal

vendor/tungstenite/examples/client.rs

@@ -0,0 +1,21 @@
+use tungstenite::{connect, Message};
+
+fn main() {
+    env_logger::init();
+
+    let (mut socket, response) = connect("ws://localhost:3012/socket").expect("Can't connect");
+
+    println!("Connected to the server");
+    println!("Response HTTP code: {}", response.status());
+    println!("Response contains the following headers:");
+    for (header, _value) in response.headers() {
+        println!("* {header}");
+    }
+
+    socket.send(Message::Text("Hello WebSocket".into())).unwrap();
+    loop {
+        let msg = socket.read().expect("Error reading message");
+        println!("Received: {msg}");
+    }
+    // socket.close(None);
+}