Sustainable E-Commerce Packaging Market Size & Forecasts 2026-2035, By Segments (E-Commerce Type, Material Type, Application), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (Amcor, Smurfit Kappa, DS Smith, Mondi, Sealed Air)