Changed the default way to modify values in store. Added basic validation to stores. Using interfaces to DI store objects.

Requests/UpdateDefaultTTSVoice.cs

@@ -8,10 +8,10 @@ namespace HermesSocketServer.Requests
     {
         public string Name => "update_default_tts_voice";
         public string[] RequiredKeys => ["user", "voice"];
-        private UserStore _users;
+        private IStore<string, User> _users;
         private ILogger _logger;
 
-        public UpdateDefaultTTSVoice(UserStore users, ILogger logger)
+        public UpdateDefaultTTSVoice(IStore<string, User> users, ILogger logger)
         {
             _users = users;
             _logger = logger;