Use InfoBadge for indicating remaining works on status center icon

[hez2010]

Microsoft.UI.Xaml 2.7.0 introduced an InfoBadge control, we can use it on status center icon to show the status and the number of remaining on-going works.

Depends on #6136.

Initial proposal

10 on-going tasks running:

0 on-going tasks running and all tasks succeeded:

Errors occurred after all on-going tasks done:

[yaira2]

@hez2010 do you want to work on this?

[hez2010]

Ok, will take a look.