Boiler System Market Size, Share, and Industry Analysis By Type (Fire-Tube Boiler, Water-Tube Boiler, Electric Boiler, Condensing Boiler, and Combination Boiler), By Fuel Type (Coal-Fired, Gas-Fired, Oil-Fired, Biomass, and Electric), By Pressure (Low-Pressure (15–20 bar), Medium-Pressure (20–80 bar), and High-Pressure (More than 80 bar)), By Component (Boiler Unit, Economizer, Superheater, Air Preheater, and Feed Pump), and By End User (Power Generation, Process Industry, Oil and Gas, Pharmaceutical, Metals, and Others), and Regional Forecast, 2026-2034