4 backports to do

main	14.3	13.4
Merged #92187 [TASK] Unify ViewHelper arguments naming Author Simon Praetorius Updated 01/15/26, 12:43 Affected Files 2 Patchsets 4 Reviews 6 Verifies 7		Review is missing.
Merged #93657 [BUGFIX] Introduce `PackageSetup` to unify extension setup Author Helmut Hummel Updated 04/16/26, 07:25 Affected Files 7 Patchsets 9 Reviews 4 Verifies 5		#93689 [BUGFIX] Introduce `PackageSetup` to unify extension setup 13.4 Author Helmut Hummel Updated 04/16/26, 11:51 Affected Files 7 Patchsets 1 Reviews 2 Verifies
Merged #95393 [BUGFIX] Import page translations onto their parent page Author Benjamin Kott Updated 09/02/26, 21:59 Affected Files 3 Patchsets 3 Reviews 4 Verifies 4	Merged #95582 [BUGFIX] Import page translations onto their parent page 14.3 Author Benjamin Kott Updated 09/02/26, 21:59 Affected Files 3 Patchsets 3 Reviews 2 Verifies 2	Review is missing.
Merged #95555 [BUGFIX] Avoid PHP error on unresolvable page layout Author Stefan Bürk Updated 09/03/26, 09:16 Affected Files 2 Patchsets 3 Reviews 7 Verifies 5	Merged #95594 [BUGFIX] Avoid PHP error on unresolvable page layout 14.3 Author Stefan Bürk Updated 09/03/26, 09:14 Affected Files 2 Patchsets 2 Reviews 2 Verifies 2	Review is missing.