Self-Healing Polymers Market Size, Share & Industry Analysis, By Healing Mechanism (Extrinsic Self-Healing Polymers, Intrinsic Self-Healing Polymers, and Hybrid Self-Healing Systems), By Polymer Matrix (Thermosetting Polymers, Elastomers, Thermoplastic Polymers, and Others), By End-Use Industry (Automotive & Transportation, Building & Construction, Electrical & Electronics, Aerospace & Defense, Energy, and Others), and Regional Forecast, 2026-2034