Palm Beach’s newest gourmet grocer and fine-food emporium has been bustling as patrons fill their carts with everything from Heinz ketchup to hormone-free grass-fed beef, smoked salmon, Cipriani bellini mix and cucumber-and-tomato salad. Amici Market — with its tastefully simple red, green and white logo centered with a ruby-red tomato image — opened Tuesday, occupying approximately 5,700 square feet formerly home to Market Salamander and before that, Herbert’s Lafayette.