With legacy removed we are missing cronjobs for many features.

This feature should ideally be done together with EZP-24178 "Async" as they should use same background process for handling "tasks", no matter if it comes from que or is periodically scheduled work (aka cronjobs).

TODO, define list of cronjobs, and other maintenance scripts that should be part of this, places to look in legacy are:

• https://github.com/ezsystems/ezpublish-legacy/tree/master/cronjobs
• https://github.com/ezsystems/ezpublish-legacy/tree/master/bin/php
• https://github.com/ezsystems/ezpublish-legacy/tree/master/update/common/scripts