Types from @figma/plugin-typings are not available when installed

[wesgro]

👋 Loving this tool

I noticed that the page nodes I get back from getAllPages() are typed as any which I believe is because y'all are depending on ambient types from the @figma/plugin-typings existing which will not be the case when this library is installed externally.

I think the fix would be to make that a dependency of this package and import them over expecting them to be implicitly available through typeRoots

[wesgro]

Upon further inspection it looks like those types are meant to be included this way... So maybe it just needs to part of the install instructions