Global Smart Coatings Market – Analysis and Forecast (2025-2030) Industry Insights by Function (Anti-Corrosion, Anti-Icing, Anti-Fouling, Self-Healing, Self-Cleaning), by Layer (Single, Multi), by End-User (Automotive & Transportation, Aerospace & Defense, Marine), and by Geography (North America, Europe, Asia-Pacific, Middle East, and Rest of the World)