Add text description to WebSocket for state logging

damus/Nostr/WebSocket.swift

@@ -13,6 +13,19 @@ enum WebSocketEvent {
     case message(URLSessionWebSocketTask.Message)
     case disconnected(URLSessionWebSocketTask.CloseCode, String?)
     case error(Error)
+    
+    var description: String? {
+        switch self {
+        case .connected:
+            return "Connected"
+        case .message(_):
+            return "Received message"
+        case .disconnected(let close_code, let reason):
+            return "Disconnected: Close code: \(close_code), reason: \(reason ?? "unknown")"
+        case .error(let error):
+            return "Error: \(error)"
+        }
+    }
 }
 
 final class WebSocket: NSObject, URLSessionWebSocketDelegate {