[Feature Request] Support for adding Images by URL

[mutschler]

I know there's image Upload by drag & drop which i currently use, but there are 2 things bothering me:

1. The Original Source is lost (im putting it in notes atm)
2. I have to save download the image and drag it to hoarder

When adding the URL directly it acts exactly as in #28 (image seems to be downloaded, stored, shown in preview) but is not viewable when opening detail view

since there's alread #28 with an additional Content-Type for display... maybe consider support for multiple Content-Types in the detail view.

[kamtschatka]

Yeah i already have that on the radar