Global Baseboard Heater Market Size, Share Demand Report By Product Type (Electric Baseboards, Hydronic Baseboards, Smart/IoT-Enabled Baseboards, Hybrid Electric-Hydronic Baseboards), By Application (Residential, Commercial, Industrial, Public Sector), By Distribution Channel (Offline Retail, Online Retail, Direct B2B, Specialty Stores) By Region & Segment Forecasts, 2025–2030