NEW YORK (Reuters) -France and Britain need to show that they are allies and friends in this complicated world, President Emmanuel Macron said on Tuesday after meeting newly appointed British Prime Minister Liz Truss. The two leaders were meeting face-to-face for the first time and just weeks after Truss questioned whether Paris was a friend or foe. Relations between the two powers have been difficult ever since Britain left the European Union. “I now believe in proof, in results,” Macron said. “There is a will to re-engage, to move on and to show that we are allies and friends in a complex wo…