KATHMANDU, Nepal — On Tuesday, Mount Everest grew by more than two feet.So agreed China and Nepal, two countries that share a treacherously mountainous border and increasingly warm relations.... Xi made a year ago during a visit to the Nepali capital, where he announced with his Nepali counterpart, Bidya Devi Bhandari, that the countries would jointly measure the mountain. China’s relations with its other Himalayan neighbors have not been as warm.... Tensions with India soared in June when una