The  Michelin Guide is known for identifying the crème de la crème of dining in the nation’s hottest cities. And for the first time, it’s coming to Boston. Today on Say More, Shirley Leung is joined by Boston Globe Restaurant Critic Devra First to discuss what Michelin means for the city, and how the challenges facing  Boston restaurants, including high rents and the steep cost of living, are impacting industry workers and diners alike