add a feature flag for enabling crossOriginIsolated

[ndelangen]

What I did

I added a feature flag to enabling the header to get SharedArrayBuffer to work.
We need to make this opt-in because it broke some storybooks

[nx-cloud]

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[tmeasday]

LGTM but I wonder if it should be a core option?

[ndelangen]

what's the rationale behind features vs core? It feels a little bit arbitrary.

[shilman]

@ndelangen @tmeasday

My thinking is that feature flags are a temporary mechanism by which we turn code on and off to:

• to make breaking changes available in minor releases
• temporarily support legacy options that we plan to remove
• piloting experimental features

Code to configure other aspects of storybook should be located elsewhere. I think this one should go in core.

[ndelangen]

I changed it to be in core

[tmeasday]

That's what I suspected. Thanks for clarifying @shilman