examples/mpd-client: add some code

examples/mpd-client/main.rs

@@ -1,3 +1,14 @@
-fn main() {
-    todo!()
+use empidee::MpdClient;
+
+#[tokio::main(flavor = "current_thread")]
+async fn main() -> anyhow::Result<()> {
+    let socket = tokio::net::TcpSocket::new_v4()?;
+    let mut stream = socket.connect("127.0.0.1:6600".parse()?).await?;
+
+    let mut client = MpdClient::new(&mut stream);
+    println!("{}", client.read_initial_mpd_version().await?);
+
+    client.play(None).await?;
+
+    Ok(())
 }