Marine Gearbox Market Size & Forecasts 2026-2035, By Segments (Number of Engine, Propulsion System, Sales Channel, Product Type, Type, Application, Component), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (ZF, Rolls-Royce, Masson Marine, Twin Disc, Reintjes)