Huge Overhaul!

Just majorly updated this package.

Changes:

• Moved Create menu next to the New Folder button.
• Changed how the system handles creating script types -- Users can now create their own script profiles by clicking the CreatorType sub-option in the menu.
• Added Animator StateMachineBehaviour type -- Titled AnimatorType.
• Added Generic Class type -- Titled GenericType.
• Converted ScriptableObject option to new system -- Titled ScriptableType.