Global Functional Ink and Coating Market Size, Share, Growth Analysis By Product Type (Conductive Inks & Coatings, Anti-Microbial Coatings, Anti-Corrosion Coatings, UV-Curable Functional Inks, Self-Healing Coatings), By Function (Electrical Conductivity, Barrier Protection, Optical & Photovoltaic, Thermal Management), By Application, By End-Use Industry, Market Trends & Forecast 2026-2034