add import to contractor option depening on file type

[swizzle]

Let's say I download a picture from Google. It's saved in Downloads.
Now I navigate to Downloads and to get the Picture into Pantheon-Photos I've to for example copy the image into the Pictures directory.
Faster would be a contractor option "Import to Pantheon-Photos". So I can select all my Pictures and import them into Photos. Obviously in the background they would be copied into Pictures.
I say depending on file type because this scenario also works with music files by importing them into Noise.