updating countries

SchengenVisaApi/ApplicationLayer/Services/GeneralExceptions/EntityUsedInDatabaseException.cs

@@ -0,0 +1,7 @@
+using ApplicationLayer.GeneralExceptions;
+
+namespace Infrastructure.Database.GeneralExceptions
+{
+    /// Exception to throw when can't complete some action on entity(delete or something) because it's needed for other entities
+    public class EntityUsedInDatabaseException(string message) : ApiException(message);
+}