Changed exceptions, added action for closing applications by applicant

SchengenVisaApi/ApplicationLayer/Services/GeneralExceptions/EntityNotFoundException.cs

@@ -1,9 +1,6 @@
 using ApplicationLayer.GeneralExceptions;
-using Domains;
 
 namespace ApplicationLayer.Services.GeneralExceptions;
 
 /// Exception to throw when entity not found
-/// <typeparam name="T">Not found entity type</typeparam>
-public class EntityNotFoundException<T>(string message) : ApiException(message)
-    where T : class, IEntity;
+public class EntityNotFoundException(string message) : ApiException(message);