Make sure banner "this is an experiment" stands out in Release 1

[KimberlyglennTSM]

Example from Portland's beta site: https://beta.portland.gov/

👉 Prior issue #48

[aaronhans]

Is this a bootstrap component already @artuoma ? I think the dismiss makes it need to be javascript powered so I'd like to make a little web component for this unless there is already a css only version or super small javascript powered thing we can use

[artuoma]

@aaronhans I think we can use the Alerts module. https://cwds.dev/docs/4.3/components/alerts/
Do we have the JavaScript Library for it included?

[abquirarte]

sample from UK: https://design-system.service.gov.uk/components/phase-banner/

[abquirarte]

Australia example @hilaryhb and @artuoma @humancenteredhuman https://www.gov.au/alpha/starting-a-business/questionnaire-activities.html

[carterm]

This needs to create a tracking cookie that expires after [1 day] which will prevent re-display.