plasmoid: Add job count badge for each printer in the list

Mike Noerequested to merge
work/noee/badge2-plasmoid into master

As a follow-on to the previous MR that added a job count badge to the main plasmoid icon, it was requested if we could do a job count badge for each printer. While not unreasonable, it is a bit of niche as it's really only useful when there are many printers and/or many print jobs.

The badge is situated top/left because the icon can also have and emblem signifying printer status (paused/stopped).

Draft: Kirigami.Badge looks quite different than Workspace.BadgeOverlay, opinions appreciated.

Kirigami.Badge Workspace.BadgeOverlay
Screenshot_20260429_045430 Screenshot_20260429_042707

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