Semi-Truck Market Size & Forecasts 2026-2035, By Segments (Truck Class, Application, Body, Propulsion, End-User Industry), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (Daimler Truck, Navistar, PACCAR, Volvo Trucks, Scania)