Spa Services Market Size, Share & Industry Analysis, By Facility (Day, Hotel/Resort, Medical, and Others), By Service (Massage, Beauty/Grooming, Physical Fitness, and Others), By Customer Experience (Luxury and Budget-friendly), By Customer Age Group (Below 18 Years, 19 to 35 Years, 36 to 50 Years, and Above 50 Years), By End-User (Men and Women), and Regional Forecast, 2026-2034