Border for Panel

[rodrigoGA]

I believe that adding the ability to define the border style would significantly enhance the visual appeal. We can implement a design similar to the Windows 11 menu, following the Fluent design guidelines.

Attached are images of a panel with a border and one without, to illustrate the visual improvement.

[Hirnmoder]

I think this is a duplicate of #2000

[stale]

This issue has been automatically marked as stale because it has not had recent activity. Thank you for your contributions.