Auto Generate universal icon types

[danspratling]

Currently, each icon has types generated but if you want to cast types to a prop outside the library this is really awkward.

Consider the following

export const Button = ({ icon }: { icon: any }) => (
  <button>
    {icon}
    Click me!
  </button>
)

What should the type of icon be?

The closest the library creates right now would mean having to do something like importing a random icon and then using typeof to figure out its type, but this isn't clear and doesn't appear as a generic icon type.

Ideally, we'd be able to do something like `import type { NoIconType } from '@noicons/react'