Allow file attachment into the comments editor (Markdown)

[koppor]

How to reproduce

1. Create a library with the file directory is .
2. Firefox: Visit https://www.sequoiacap.com/article/ai-powered-developer-tools/
3. Firefox: Import into JabRef
4. Go to the tab "Comments"
5. From Firefox: drag'n'drop the image onto the comment field

Expectation:

1. ![](dev-ai-wide-10.png) appears in the editor
2. dev-ai-wide-10.png exists next to the .bib file (which is the file directory configured for the bib file)

Actual behavior

File is attached

Additional Info

Note: Deep link to the image: https://www.sequoiacap.com/wp-content/uploads/sites/6/2023/03/dev-ai-wide-10.png?resize=1440,1400

TODOs

• 1. Use JabRef's download functionality
• 2. Add link into comment field (next to cursor)
• 3. Change "Find unlinked files" to ignore files linked in the comment fields

Background:

• Feature in VS.Code: https://code.visualstudio.com/updates/v1_79#_editor

[DavidCoy77]

Hello, I'm an undergraduate programming major that's eager to make my first GitHub contribution. Would I be able to claim this issue? Thanks!

[DavidCoy77]

I'm thoroughly occupied with the other issue I claimed (#10558), so I "unassigned" myself on this one. I'm not going to work on it at all, so it is completely free for someone else to claim.