Add support for drag and drop to insert links and images in qmd files

[juanfcocontreras]

It would be very useful to be able to generate markdown links for both images and links by dragging and dropping, just like in the native Markdown edition in Visual Studio Code:

https://code.visualstudio.com/docs/languages/markdown#_drag-and-drop-to-insert-links-and-images

[jjallaire]

Thanks for the feedback! We will try to implement this soon.

[floswald]

This would be an amazing feature to have. thanks