Airline Ancillary Services Market Size, Share, and Industry Analysis By Airline Type (Full Cost Carrier and Low Cost Carrier), By Services type (Pre-flight (Seat Selection, Lounge access & Others (Extra baggage allowance and Priority Boarding)), In-flight (IFE (In-flight entertainment), Food & Beverages, Retail Options, and Others (Wi-Fi services)), and Post-flight (a-la-carte services)), By Travel type (International and Inländisch) und regionale Prognose bis 2032