Utility for helping with required field labels

[mimarz]

Should we introduce an opt-in helper utility (css?) for adding "required" tag to labels where fields are required.

• Have a pure CSS utility that maybe uses pseudo element (styled as tag).
• Should we have a data-attr that adds a required tag to nearest label when input has required?
• Should we support custom style for how required "tag" looks?
• Inspiration:
  • https://design.mattilsynet.no/?path=/docs/designsystem-field--docs
  • https://design.udir.no/latest/?path=/docs/components-fieldnecessity--docs?