Get one Zomato restaurant's menu

Returns one restaurant's menu grouped into categories, plus its restaurant summary. A category is named by Zomato's own sub-heading when it has one (e.g. "Veg Burgers") and otherwise by the menu section it sits under (e.g. "Burgers"), since most restaurants name only the section level. Each item carries a name, description, veg/non-veg flag, image, and price when Zomato's own anonymous response includes one -- confirmed live, item prices are commonly gated behind login for the delivery-ordering flow, so price is frequently absent even though the item itself is public.