Support structured data

[VDK]

at the moment, none of a file's structured data is copied to its cropped version.

At the very least, a file's source information (example) should be copied

[trnstlntk]

I would also like to see structured data of a cropped file copied to the new file.

The following structured data is often used, and would stay applicable for a cropped file:

• Source of file
• Inception
• Creator
• Copyright status
• Copyright license

Example of file for which the SDC was not copied upon crop: https://commons.wikimedia.org/w/index.php?title=File:Charles_Bommer_et_Jean_Massart_-_Les_aspects_de_la_vegetation_en_Belgique.Les_districts_littoraux_et_alluviaux(1908)Planche_86(cropped).jpg&oldid=748722727