Global Smart Plug Market Size, Share & Demand Report By Product Type (Wi-Fi Smart Plugs, Bluetooth Smart Plugs, Zigbee Smart Plugs, Energy Monitoring & Surge-Protected Smart Plugs), By Application (Residential, Commercial, Industrial), By Distribution Channel (Online Retail, Offline Retail, Utility & Telecom Partnerships), By Region (North America, Europe, Asia-Pacific, Latin America, Middle East & Africa), and Segment Forecasts, 2025–2030