Parses an XMP date; never throws.
public static bool TryParse(string? text, scoped out XmpDate date)
The text, such as 2014-09-24T21:23:03Z. Leading and trailing white-space is ignored.
The date, or default when text is not one.
true when text is a date in one of the forms the remarks list.ISO 16684-1 §8.2.1.2.