create a mask plugin that enables me to create configurable players masks that attach to helmets in the form of a player head. - make it so these masks can be equipped by dragging and dropping onto a helmet and removed by right clicking a helmet that has a mask attached to it. - make it so these masks have effects when applied that can be configured within the config yml - make the following effects within the configurable config that work, 2x sell bonus, flight, 2.5% extra damage, 2.5% incoming damage, speed 4. - if a mask is attached make it so the player sees the player head skin of the mask over the helmet - make it so that I can set each mask to have a texture and that can be easily configured - make a languages yml so I can change every message within the plugin