Global Hair Salon Service Market Size, Share & Demand Report By Service Type (Hair Cutting Services, Hair Coloring Services, Hair Styling Services, Hair Treatment Services, Chemical Services, Others), By Customer Demographic (Male Customers, Female Customers, Children & Teenagers), By Salon Type (Independent Salons, Franchise Salons, Luxury/Premium Salons, Budget/Value Salons, Mobile/On-Demand Salons), By Distribution Channel (Walk-in Services, Online/App-Based Booking, Subscription Models), By Region & Segment Forecasts, 2026–2031