Option to load multiple folders of images to or a image list from a file to the next/previous image list

[Anangaya]

Requested Feature/Change

It would be nice to have a feature to load images from multiple folders or from a text file containing image paths through cli. (loading multiple folders should be practical from the gui as well)

Motivation or Use Case of this Change

Would make it easier to use with Directory Opus instead of using the Directory Opus built-in viewer. Directory opus is very capable of gathering all the image folders I want to view that are all over my pc. So if I have this option I can just play all the image I need without having to browse images inside the photoqt.