* convert premium card to banner component
- create VaultBanners component that will handle all banner logic
* move upgrade browser notice to banner component
* refactor verify email component to use the banner component
* add email banner to VaultBanners component
* move low KDF message to banner component
* remove unused KDF component
* allow multiple banners to be displayed at once
* use vault service to consolidate premium banner logic
- Implement prompt thresholds for premium banner
- Update dismiss logic to re-run visibility logic
* update variable name
* move all dismiss/show logic to vault banner service
* rename tense of methods for readability
* apply underline to send email button to match other banner actions
* fix dark mode styling across banners
* remove unused variable
* use bitLink directive for styling rather than tailwind
* move premium banner to a standalone observable
* update bootstrap styles to tailwind
* use new KDF service for vault banners
* move the VerifyEmailComponent to a standalone component
* convert premium banner to a singular observable
* remove unneeded import
* AC-2589 add unique id for each vault banner
* AC-2588 poll sync service to only show premium banner after a sync
* close subscription to syncCompleted$ after one emit
* remove unneeded ReplaySubject
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