Registration of classes in the same namespace as ICat

RegistrationsInNamespace.cs

public static void Run(IServiceCollection services)
{
  services.Scan(scan => scan
    .FromAssemblyOf<ICat>()
    .AddClasses(classes => classes.InNamespaceOf<ICat>())
    .AsImplementedInterfaces()
    .WithTransientLifetime());
    
   services.AddSingleton<IApplication, Application>();
}