[FEATURE] Add keyboard shortcut in FormEngine for Save & Close

A new hotkey is introduced in the FormEngine scope that lets editors
invoke "Save and Close" via `Ctrl/Cmd+Shift+S`.

Resolves: #103529
Releases: main
Change-Id: I530a1df54707eb69033c8a03ccf58517facf162a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83642


Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: Andreas Kienast <a.fernandez@scripting-base.de>
Reviewed-by: Andreas Kienast <a.fernandez@scripting-base.de>