Access Artist, XPAuthor, Creator, etc EXIF fields with osxphotos query/export/etc

**Is your feature request related to a problem? Please describe.** I'm starting ti set and use the following EXIF, XMP fields to register the family member author of the pics. Artist XPAuthor Creator Copyright By-line CreatorTool 1. How to access them? 2. Could we add them to PhotoInfo? 3. Would if make sense to add them also to pushexif? **Describe the solution you'd like** - option 1: I always forget how to access additional database table fields with `osxphotos query --field title template` - option 2, can we/ should we add such fields to PhotoInfo **Describe alternatives you've considered** - option 1. **Additional context** N/A