[Feature Request] Add the ability to scroll through albums (image files) by swiping

Currently, you can view albums, open a picture, then all you can do is zoom until you close it using the back button and then open another picture. It would be great if you could just swipe left/right for next/previous picture in the folder when looking at individual pictures. For performance and compatibility, I'd keep it image file only, so jp(e)g, png, webp and gif, skipping videos, documents, audio and so on. Though videos depends on the impact it has on performance.

"Just use a gallery app?"

Yes, for files on my phone storage I already do, but that's not an option for pictures on a Samba/smb share or any kind of storage which requires the network capabilities of Material Files.

Start by locating the image viewer entry point and how it enumerates files in a folder. Trace navigation for local and network-backed storage, then define completion as horizontal swipes opening the previous or next supported image while skipping videos and non-image files; verify behavior on both local folders and SMB shares.