Britain’s Duke and the Duchess of Cambridge left Pakistan on Friday afternoon after concluding their inaugural visit, which captured the nation’s attention for five days but will be remembered for years to come.The royal couple arrived in the capital of Islamabad on Monday night to a red-carpet welcome and an eager media scrum.Kate Middleton’s decision to don an elegant aqua shalwar kameez, Pakistan’s national dress of a tunic with trousers, was received positively by many in the nation.On…