President Biden and first lady Jill Biden are known to be every-eaters, typically favoring red-sauced pastas and chicken tenders. But in the menu for the state dinner on Thursday night honoring French President Emmanuel Macron and his wife, Brigitte Macron, their usual brand of homey-classic is getting an appropriately elegant polish, starting with an elegant first course of butter-poached lobster and caviar and finishing with a crème fraîche ice cream — a highbrow version of the president’s favorite dessert.