feat: Add Hint as component and Label and FieldSet props

[RubenSibon]

Describe the pull request

Mark form fields as not required.

What

Adds text to a label or a field set's legend if the form element (input, field set, etc.) is explicitly marked as not required. The text communicates that the field is not required for submission of the form.

Why

There needs to be a way to communicate to end-users what form fields are not required.

How

Properties are added to Label and Field Set to set them as required. The values should be the same as the associated

Checklist

Before submitting your pull request, please ensure you have done the following. Check each checkmark if you have done so or if it wasn't necessary:

• Add or update unit tests
• Add or update documentation
• Add or update stories
• Add or update exports in index.* files
• Start the PR title with a Conventional Commit prefix, as explained here.

Additional notes

• Documentation needs attention
  • We should link to discussions about best practices around marking fields as "required", "optional" or "not required".