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

Hermes/Socket/Requests/GetEnabledTTSVoices.cs

@@ -0,0 +1,41 @@
+using System.Text.Json;
+using Serilog;
+
+namespace TwitchChatTTS.Hermes.Socket.Requests
+{
+    public class GetEnabledTTSVoicesAck : IRequestAck
+    {
+        public string Name => "get_enabled_tts_voices";
+        private readonly User _user;
+        private readonly JsonSerializerOptions _options;
+        private readonly ILogger _logger;
+
+        public GetEnabledTTSVoicesAck(User user, JsonSerializerOptions options, ILogger logger)
+        {
+            _user = user;
+            _options = options;
+            _logger = logger;
+        }
+
+        public void Acknowledge(string requestId, string json, IDictionary<string, object>? requestData)
+        {
+            var enabledTTSVoices = JsonSerializer.Deserialize<IEnumerable<string>>(json, _options);
+            if (enabledTTSVoices == null)
+            {
+                _logger.Warning("Failed to load enabled tts voices.");
+                return;
+            }
+
+            if (_user.VoicesEnabled == null)
+                _user.VoicesEnabled = enabledTTSVoices.ToHashSet();
+            else
+            {
+                _user.VoicesEnabled.Clear();
+                foreach (var voice in enabledTTSVoices)
+                    _user.VoicesEnabled.Add(voice);
+            }
+
+            _logger.Information($"TTS voices [count: {_user.VoicesEnabled.Count}] have been enabled.");
+        }
+    }
+}