Support drag file from logseq to file explorer

Right now if you drag an PDF asset out from logseq you can’t. The easiest way to do this is navigate to the asset folder and figure out which pdf you have. I suggest logseq implement the drag and drop interface so people can drag pdf from logseq and copy it to other places.

I’m willing to implement this, but I think I would need some instructions on which part of logseq should I modify.