Vietnam Fuel Cell Market By Type (Solid Oxide Fuel Cell (SOFC), Proton Exchange Membrane Fuel Cell (PEMFC), Molten Carbonate Fuel Cell (MCFC), Phosphoric Acid Fuel Cell (PAFC), Others), By Application (Portable, Stationary, Vehicle), By Size (Small and Large), By End User (Residential, Transportation, Data Center, Military & Defense, Others), By Region, Competition, Forecast and Opportunities 2028