Smart Coatings Market Size, Share & Trends Analysis Report By Layer Type (Single Layer Coatings, Multi-Layer Coatings), By Function (Anti-corrosion, Anti-fouling, Antimicrobial, Self-healing, Self-cleaning, Anti-icing coatings), By End-User (Automotive, Transportation, Marine, Construction, Aerospace and Defense, Healthcare) and By Region (North America, Europe, APAC, Middle East and Africa, LATAM) Forecasts, 2026-2034