[FEATURE] Add new CLI command "impexp:export"

This change introduces a new CLI command "impexp:export"
which allows to export the TYPO3 page tree based on a
fine-grained configuration.

Both CLI commands "impexp:export" and "impexp:import"
no longer offer option shortcuts to improve the clarity
of the command when the user does a quick search.

Resolves: #84718
Releases: master
Change-Id: I00d87f94544d1abfa0d547639b67afb8a8eea112
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70393


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>