Move printing to a separate library
The printing parts of gtk are fairly standalone.
We really don't want to carry this api surface forward if we can help it.
- Moving printing to a separate library and maybe even a separate project would be a logical step
- Move print dialogs to that dialog as well, or move it directly to the portal backends
- We may still want to keep a simplified print api in gtk, like the one sketched out here: #5562 (closed)
Edited by Matthias Clasen