Implement the Buff Class system with the following classes and effects: Cowboy Class (Increase 15% Reload Speed, Increase 15% Equip Time), Ironclad Class (100 Health -> 150 Health), Knight Class (100 Health -> 120 Health), King Class (Double damage when using Excalibur), Frankenstein Class (Immune to lightning strikes), Musician Class (Recovered double the health compared to the present), Hunter Class (Double damage for ranged weapons), Horse Class (Speed 25 -> 30).