Consider renaming `Icon` type to `PhosphorIcon`

[ajmnz]

Following the v2.1.8 release that suffixed all icons with Icon, renaming the Icon type to PhosphorIcon would also contribute towards a better DX and more targeted suggestions. For example:

• Import autocomplete for Icon is much more polluted than PhosphorIcon
• It's way more readable and predictable when used as a React prop

interface Props {
  title: string;
  icon?: Icon; // what kind of Icon?
}

interface PropsV2 {
  title: string;
  icon?: PhopsphorIcon; // clear and concise
}

[fausanchez]

You can use it like this:

import type { Icon as PhosphorIcon } from "@phosphor-icons/react";