Add GraphQL stub and opening paragraph for guide (#34992)
Add GraphQL stub and opening paragraph for guide (#34992)

* Add GraphQL opening paragraph for guide

* Update guide/english/graphql/index.md

Co-Authored-By: s-Hale <3a504728a52e00a6c0d9bb52be1b805ed52d0b49@homeport.org.uk>

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