file attachments

[seelaman]

• Have you read our product documents and seen our project board?
  Yes, also checked on Discord

• Have you read VISION.md. Do you think your feature is v1, v2, or v3?
  V1, the functionality is pretty much there, a file:///myfile.epub link just opens in an athens browser window instead of the natively preferred app. On Linux this could be xdg-open

The feature request:
Adding clickable file attachments as links using file:/// links with support for any filetype, not just images.

Bonus points if you could just drag a file into the editor like we already have with image files

Extra Bonus points if you can choose to copy the file into the athens directory and use a relative link to keep it machine-independent. That also exists already with the images subdirectory it looks like. Personally I've been using an ./assets subdirectory in my markdown system but it could also live in ./images or any other local directory of course.

Thanks for what looks like an awesome project! Makes me want to learn Clojure to contribute.