Moved Requests classes to here. Added some checks to requests.

Requests/GetTTSVoices.cs

@@ -1,5 +1,3 @@
-using HermesSocketLibrary.db;
-using HermesSocketLibrary.Requests;
 using HermesSocketLibrary.Requests.Messages;
 using HermesSocketServer.Store;
 using ILogger = Serilog.ILogger;
@@ -9,6 +7,7 @@ namespace HermesSocketServer.Requests
     public class GetTTSVoices : IRequest
     {
         public string Name => "get_tts_voices";
+        public string[] RequiredKeys => [];
         private VoiceStore _voices;
         private ILogger _logger;
 
@@ -27,7 +26,7 @@ namespace HermesSocketServer.Requests
             });
 
             _logger.Information($"Fetched all TTS voices for channel [channel: {sender}]");
-            return new RequestResult(true, voices, notifyClientsOnAccount: false);
+            return RequestResult.Successful(voices, notifyClientsOnAccount: false);
         }
     }
 }