Add FAQ with link to GraphQL workarounds

[CypressCecelia]

I'm submitting a...

[ ] Bug report
[X] Content update
[ ] Process update (build, deployment, ... )

Type of bug / changes

This issue has multiple GraphQL workarounds but there is currently no mention in our docs. Need to add an FAQ so it is searchable, however a better solution for the future is still needed (Linking to GitHub issue is not ideal).

#122

[CypressCecelia]

There are additional workarounds in this thread as well cypress-io/cypress#687 (comment)

Not sure if we will need this anymore with full network stubbing coming out though. @jennifer-shehane should I hold off?

[jennifer-shehane]

That will come out as experimental pretty soon and the docs for that mention to use the new experimental feature from cy.route() so maybe not https://github.com/cypress-io/cypress-documentation/pull/2854/files#diff-e82e0eb85a12faaaea4008db1c7a0e96

[amirrustam]

No longer needed due to cy.intercept. @kevinold is also diving into GraphQL examples