rustfmt & signal_client improvememts

- handle ping message
- recv now only returns on SignalResponse

examples/simple_room/src/main.rs

@@ -0,0 +1,19 @@
+use livekit::proto::data_packet;
+use livekit::room;
+
+const URL: &str = "ws://localhost:7880";
+const TOKEN : &str = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2NjgxMzc0NDgsImlzcyI6IkFQSXpLYkFTaUNWYWtnSiIsIm5hbWUiOiJ3ZWIiLCJuYmYiOjE2NjQ1Mzc0NDgsInN1YiI6IndlYiIsInZpZGVvIjp7InJvb21DcmVhdGUiOnRydWUsInJvb21Kb2luIjp0cnVlfX0.6VMDdXJYrW3KWrEzxx4hzbmMQnjQIRILQ48Qrbx5j44";
+
+// eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2NjgxMzc0NDgsImlzcyI6IkFQSXpLYkFTaUNWYWtnSiIsIm5hbWUiOiJ3ZWIiLCJuYmYiOjE2NjQ1Mzc0NDgsInN1YiI6IndlYiIsInZpZGVvIjp7InJvb21DcmVhdGUiOnRydWUsInJvb21Kb2luIjp0cnVlfX0.6VMDdXJYrW3KWrEzxx4hzbmMQnjQIRILQ48Qrbx5j44
+
+#[tokio::main]
+async fn main() -> Result<(), room::RoomError> {
+    tracing_subscriber::fmt::init();
+
+    let mut room = room::connect(URL, TOKEN).await?;
+    room.local_participant()
+        .publish_data(b"this is a test", data_packet::Kind::Reliable)
+        .await?;
+
+    Ok(())
+}