Add a setting for sending a notification on BEL#19936

zadjii-msft wants to merge 3 commits intodev/migrie/fhl-spring26/activity-notificationsmicrosoft/terminal:dev/migrie/fhl-spring26/activity-notificationsfrom

dev/migrie/fhl-spring26/bellStyle-notificationmicrosoft/terminal:dev/migrie/fhl-spring26/bellStyle-notificationCopy head branch name to clipboard