Hot and Cold Water Dispensers Market Size & Forecasts 2026-2035, By Segments (Water Heating Technology, Cooling Technology, Water Source, Dispenser Type), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (Primo Water, Coway, Cuckoo, Midea Group, LG Electronics)