Built in xvfb support

[mpetrunic]

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Currently, in github actions, we need to run tests with xvfb-run --auto-servernum yarn test
which is unusual to inexperienced devs.

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I would propose that we add additional option gui: boolean which would be true by default and utilize https://www.npmjs.com/package/@cypress/xvfb or https://www.npmjs.com/package/xvfb to achieve this in code

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cc @BeroBurny

[Lykhoyda]

@mpetrunic probably it's not relevant anymore as we are running headless mode in chrome directly

[mpetrunic]

Yup