Warn users about losing data from deletion of unpinned workspaces

[jldec]

Unopened workspaces are automatically deleted afer a couple of weeks unless they are pinned.
It would be helpful to warn users before this happens, either in the UI, or via notification emails.

(Suggestion from support user internal.)

[svenefftinge]

Maybe easy to overlook, but it is there.

[gtsiolis]

This message can become visually better and thus more noticeable, re-posting screenshot below from #10450 (comment).

Alternatively, or additionally, we could improve the workspaces empty state or introduce a welcome modal to help educate users and make them more aware about the garbage collection[1] and the task-based approach[2] of ephemeral workspaces.

Improved garbage collection information	Improved workspaces empty state	Welcome modal

[axonasif]

What if we put it on the top of the list in a rather big noticeable info box?
Right now it might not be very much visible.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[YoungElPaso]

An email notification would be great as well! Or generally, just some logs. Feels like there should be logs for all workspace creation/deletion.