Stick Pouches Packaging Market Size & Forecasts 2026-2035, By Segments (Seal Type, Closure Type, Application, Material Type), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (Amcor, Bemis Company, Sealed Air, Mondi Group, Sonoco Products)