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

Requests/GetDefaultTTSVoice.cs

@@ -8,11 +8,11 @@ namespace HermesSocketServer.Requests
     {
         public string Name => "get_default_tts_voice";
         public string[] RequiredKeys => [];
-        private readonly UserStore _users;
+        private readonly IStore<string, User> _users;
         private readonly ServerConfiguration _configuration;
         private readonly ILogger _logger;
 
-        public GetDefaultTTSVoice(UserStore users, ServerConfiguration configuration, ILogger logger)
+        public GetDefaultTTSVoice(IStore<string, User> users, ServerConfiguration configuration, ILogger logger)
         {
             _users = users;
             _configuration = configuration;