Bus Rapid Transit (BRT) Vehicles Market Size & Forecasts 2026-2035, By Segments (Application, Seating Capacity, Vehicle, Fuel), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (BYD, Zhongtong, Yutong, CRRC, King Long)