Global Protein Shakes Market Size, Share & Demand Report By Product Type (Ready-to-Drink (RTD) Protein Shakes, Protein Shake Powders, Protein Smoothie Blends), By Protein Source (Animal-Based Protein, Plant-Based Protein), By Application (Muscle Gain & Sports Nutrition, Weight Management & Meal Replacement, General Wellness & Nutrition, Clinical & Medical Nutrition), By Distribution Channel (Supermarkets & Hypermarkets, Specialty Nutrition Stores, Pharmacies & Drugstores, Online Retail, Direct-to-Consumer) By Region & Segment Forecasts, 2026–2031