Class 7 Trucks Market Size, Share & Industry Analysis, By Truck Configuration (Rigid Trucks, Tractor Units, and Vocational Trucks), By Application (Freight & Regional Distribution, Construction & Infrastructure, Municipal & Public Services, Towing & Recovery, and Specialized Vocational Applications), By Propulsion (Diesel, Natural Gas (CNG/LNG), Hybrid Electric, Battery Electric (BEV), and Hydrogen Fuel Cell (FCEV)), By Axle Configuration (4×2, 6×2, 6×4, and Others), and Regional Forecast, 2026-2034