Differentiate between local and remote fields in GraphiQL docs/schema

[hwillson]

Migrated from: #309

I use this:

https://www.apollographql.com/docs/react/local-state/client-side-schema/

to improve my devtools GraphiQL Docs. However, I don't know by looking at Docs whether I need to include @client when selecting a certain field. It would be great if there was an automatically-included differentiator for each client-side field. Barring that, it could be manually implemented if either comments or directives worked.

I can't tell that scrollY is client-only.