Introduce new `DateFormField`

[BurntimeX]

The current version of the DateFormField has several design flaws which cannot be fixen without breaking changes. Therefore, it would make sense to introduce a new version and deprecate the old version.

ref: https://www.woltlab.com/community/thread/301400-dateformfield-savevalueformat-savevalueformat-wann-verwenden/ https://www.woltlab.com/community/thread/295616-dateformfield-speichert-minuten-und-sekunden-bei-supportstime-false/ https://www.woltlab.com/community/thread/306131-utc-zeitzone-timestamp-des-dateformfields/