feat: add cleanup cron history functionality

Added a new functionality to the QUI Cron system for cleaning up cron history. These changes include:

• An additional cron task defined in cron.xml for housekeeping the cron history.
• A new function called cleanupCronHistory(array $params, Manager $CronManager) in QuiqqerCrons.php that removes old cron history entries which are older than a defined amount of weeks.
• Added a new field and additional indexes in the cron_history table in database.xml to support the new feature.
• New localized messages are added for the cron cleanup task 'title' and 'description' in locale.xml.

Related: #59 (closed)