[FEATURE] Allow editing of task groups within the scheduler module

Currently, users have to use the list module and click
on the root page to add/edit/remove a task group.

This has been changed by adding editing features for
groups within the module.

Resolves: #99874
Releases: main
Change-Id: I0103ca853649382cf055d612dd4f4d657d90dc64
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77781


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Markus Klein <markus.klein@typo3.org>