Pro 3527 when empty

[haroun]

Summary

Add whemEmpty options to inline array

What are the specific steps to test this change?

For example:

1. Run the website and log in as an admin
2. Open a piece manager modal and select several pieces
3. Click the "Archive" button on the top left of the manager and confirm that it should proceed
4. Check that all pieces have been archived properly

What kind of change does this PR introduce?

(Check at least one)

• [ ] Bug fix
• [ ] New feature
• [ ] Refactor
• [x] Documentation
• [ ] Build-related changes
• [ ] Other

Make sure the PR fulfills these requirements:

• [x] It includes a) the existing issue ID being resolved, b) a convincing reason for adding this feature, or c) a clear description of the bug it resolves
• [ ] The changelog is updated
• [ ] Related documentation has been updated
• [ ] Related tests have been updated

If adding a new feature without an already open issue, it's best to open a feature request issue first and wait for approval before working on it.

Other information:

[linear[bot]]

PRO-3527 As an admin I can easily understand what is needed when the user or group permission list is empty

[image.png](https://uploads.linear.app/4e73c947-c168-4b4a-9281-01a7243d77be/54021080-8be0-4ab1-a779-2003044a9182/47400662-32b5-4cf6-a57d-1a37ef436f57) **\[Visual reference: see the area marked "No additional user permissions"\]** The visualization of the initially empty selections (see first image above) will be handled by introducing a new feature of inline `array` fields, activated by a new `whenEmpty` option. `whenEmpty` can have `label` and `icon` subproperties. When this option is configured for an inline array field and the array is currently empty, the configured icon and label are displayed per the design above. Icons themselves should be added to the system the same way widget icons already are (see the documentation and the source code for examples). **Acceptance criteria** * When an inline array is empty, a hint appears as described above. * When an inline array is no longer empty, the hint disappears. * Configure these per the design for the user and group permissions fields.