Warning message for Group migration

Problem to solve

With the delivery of the One-click Group migration MVC, users will be able to see the new option to import a group on the New Group page. Our user research has discovered that most users did not understand what entities are being migrated and assumed that everything that belongs to a group would be copied over.

This creates a poor user experience, that leaves the user confused about what will be the end result of the migration.

Proposal

Add a Beta badge and a warning paragraph providing a more to-the-point description of the state of this feature and a link to the documentation with an explicit note about what the user can learn there.

• Beta badge component <gl-badge variant="info"
• Beta alert component <gl-alert variant="warning"
• described here links to documentation (URL TBD in this issue)
• leave feedback links to the feedback issue: #284495
• There is no affordance to remove (x) the message box. The box is permanent.

Further details

The warning should stand out from the remainder of the page. Please see an example of a warning box on this page as an illustration:

The text should read: "Caution: This feature is under development and currently migrates only some of the Group data. For the full list of what is included in the migration at this time, please read the feature documentation page"