feat: implemented registration stage of preparation on PrepareUserState

implemented auth, added auth tools AcceptNotPreparedAttribute.cs, IAuthorizedTelegramCommand.cs

JOBot.TClient/Services/PrepareUserService.cs

@@ -1,5 +1,3 @@
-using Grpc.Core;
-using JetBrains.Annotations;
 using JOBot.Proto;
 using JOBot.TClient.Infrastructure.Exceptions;
 using Telegram.Bot;
@@ -8,7 +6,6 @@ using User = JOBot.Proto.User;
 
 namespace JOBot.TClient.Services;
 
-[UsedImplicitly]
 public class PrepareUserService(ITelegramBotClient bot, User.UserClient userClient) : UserService(bot, userClient)
 {
     private readonly ITelegramBotClient _bot = bot;