Add support for people taxonomy / face collections

[roborourke]

I'm not sure if this is something we definitely want to do or just to make easier using this plugin. This feature could be added via a secondary support plugin.

That said would be good to get some thoughts.

• We could use the indexFaces method to create an index for the site and associate that with each attachment.
• Found faces can be stored as a taxonomy, using term meta for the AWS FaceId etc...
• Images can then be auto tagged to people
• Found faces can then be named in the taxonomy UI, and can show related images (or specific face crop) in the term edit UI
• Named people can be used to generate captions

[joehoyle]

Better still.. user profile avatars...