Coal Briquettes Market Size & Forecasts 2026-2035, By Segments (Calorific Value, Raw Material, Shape, Application, Grade), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (China National Coal Group, Tata Steel, PTBA, Indo Tambangraya Megah, Shanxi Energy)