Fzzy Core 0.2.0+1.19.3

Overhauled ModifierHelpers. They are now registered by a ModifierHelperType, enabling items to utilize multiple types of modifiers simultaneously.
Offhand scepters now display their particles in the offhand properly
CustomFlavorItems now automagically build their flavor in most cases, ignoring flavor or descriptions that don't exist.
ManaItems now properly ignore sending a message and making a noise when passed a blank text.