Cleaned up request acks. Added internal service bus for internal messaging.

Hermes/Socket/Requests/DeleteTTSVoiceAck.cs

@@ -0,0 +1,41 @@
+using Serilog;
+
+namespace TwitchChatTTS.Hermes.Socket.Requests
+{
+    public class DeleteTTSVoiceAck : IRequestAck
+    {
+        public string Name => "delete_tts_voice";
+        private readonly User _user;
+        private readonly ILogger _logger;
+
+        public DeleteTTSVoiceAck(User user, ILogger logger)
+        {
+            _user = user;
+            _logger = logger;
+        }
+
+        public void Acknowledge(string requestId, string json, IDictionary<string, object>? requestData)
+        {
+            if (requestData == null)
+            {
+                _logger.Warning("Request data is null.");
+                return;
+            }
+            
+            var voice = requestData["voice"].ToString();
+            if (string.IsNullOrEmpty(voice))
+            {
+                _logger.Warning($"Voice Id is invalid [voice id: {voice}]");
+                return;
+            }
+            if (!_user.VoicesAvailable.TryGetValue(voice, out string? voiceName))
+            {
+                _logger.Warning($"Voice Id does not exist [voice id: {voice}]");
+                return;
+            }
+
+            _user.VoicesAvailable.Remove(voice);
+            _logger.Information($"Deleted a voice [voice id: {voice}][voice name: {voiceName}]");
+        }
+    }
+}