[TASK] Add composer.json files for each sysext extension

Change-Id: Iaf88fc46903400d97f6f1dc3acedb3c9b438e8dd
Releases: 6.2
Resolves: #52740
Related: #47018
Reviewed-on: https://review.typo3.org/24667
Reviewed-by: Thomas Maroschik
Tested-by: Thomas Maroschik
Reviewed-by: Alexander Opitz
Tested-by: Alexander Opitz
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn