Function createAppointmentSystem

Returns {
    appointments: {
        cancel: CancelAppointmentUseCase;
        complete: CompleteAppointmentUseCase;
        query: GetAppointmentsUseCase;
        reschedule: RescheduleAppointmentUseCase;
        schedule: ScheduleAppointmentUseCase;
    };
    repositories: {
        appointments: IAppointmentRepository;
        customers: ICustomerRepository;
        services: IServiceRepository;
    };
}