feat(qconnect-transport): add native websocket transport with qcloud framing

-cx

crates/qconnect-transport-ws/src/error.rs

@@ -0,0 +1,23 @@
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum WsTransportError {
+    #[error("transport is already connected")]
+    AlreadyConnected,
+    #[error("transport is already running")]
+    AlreadyRunning,
+    #[error("transport is not connected")]
+    NotConnected,
+    #[error("transport event channel is closed")]
+    EventChannelClosed,
+    #[error("transport task channel is closed")]
+    TransportChannelClosed,
+    #[error("transport task join error: {0}")]
+    Join(String),
+    #[error("websocket protocol error: {0}")]
+    Protocol(String),
+    #[error("serialization error: {0}")]
+    Serialization(String),
+    #[error("internal transport error: {0}")]
+    Internal(String),
+}