[Feature] Add support for Adobe Lightroom's xmpDM's pick & good feature

I have searched the existing feature requests to make sure this is not a duplicate request. • Yes The feature With the addition of tagging, I was wondering if there is interest in adding "flagging" - this feature is used in Lightroom in addition to stars and tags. Many photographers use it within their Lightroom workflows to flag or reject their shots. You can read more about it [here]( I have not seen many photo apps utilize this feature, but it would be useful for those of us coming from Lightroom. There are two metadata fields that are changed based on the flag state: xmpDM:pick and xmpDM:good. In exiftool these are "Pick" and "Good". Atleast in Lightroom, their states are linked, so a Flagged photo is shown as: Unflagged just removes Good altogether. and Rejected is: I would love to have this feature for my workflow. When I import an external library, I can quickly filter a day for flagged photos and make an alb…