Add option for items to render as tools

Tools and weapons and items are rendered different in a player's hand.

However, in vanilla MC. Sticks and blaze rods are rendered as weapons and tools.

Will be cool to add the option for items to render as tools and weapons in player's hand.

This is because I want to make my wrench of Additional Stuff mod to render as a tool, but it's an item so it can have a description.