Added error message porpagation to client.

In case of quote extension, SDK disconnected client without any info why.

Author: LukaszFliegel

src/GenerativeAI.Live/Events/ErrorMessageEventArgs.cs

@@ -0,0 +1,20 @@
+namespace GenerativeAI.Live.Events;
+
+/// <summary>
+/// Provides error message event data.
+/// </summary>
+public class ErrorMessageEventArgs : EventArgs
+{
+    /// <summary>
+    /// Gets the payload of the received message.
+    /// </summary>
+    public string ErrorMessage { get; }
+
+    /// <devdoc>
+    ///    Initializes a new instance of the class.
+    /// </devdoc>
+    public ErrorMessageEventArgs(string errorMessage)
+    {
+        ErrorMessage = errorMessage;
+    }
+}

src/GenerativeAI.Live/Models/MultiModalLiveClient.cs

@@ -6,6 +6,7 @@
 using System.Text.Json;
 using System.Text.Json.Serialization.Metadata;
 using GenerativeAI.Core;
+using GenerativeAI.Live.Events;
 using GenerativeAI.Live.Helper;
 using GenerativeAI.Live.Logging;
 using GenerativeAI.Types;
@@ -560,6 +561,11 @@ public async Task ConnectAsync(bool autoSendSetup = true,CancellationToken cance
                 //log info.CloseStatusDescription
                 _logger?.LogConnectionClosedWithInvalidPyload(info.CloseStatusDescription!);
             }
+            else if (info.CloseStatus == WebSocketCloseStatus.InternalServerError && !string.IsNullOrEmpty(info.CloseStatusDescription))
+            {
+                _logger?.LogConnectionClosedWithError(info.Type, info.Exception!);
+                Disconnected?.Invoke(this, new ErrorMessageEventArgs(info.CloseStatusDescription));
+            }
             else
             {
                 _logger?.LogConnectionClosed();