[FR]: JetNews - Add previews for the glance widget

[jmateoac]

Is there an existing issue for this?

• [X] I have searched the existing issues

Is this a feature request for one of the samples?

• [X] Yes, this is a specific request related to this samples repo.

Sample app

JetNews

Describe the problem

I was looking for an example of using the new glance preview annotation and couldn't find one.

Describe the solution

Add preview for the glance widget in JetNews.

Additional context

No response

Code of Conduct

• [X] I agree to follow this project's Code of Conduct