Swipe left/right support in image viewer

**Is your feature request related to a problem? Please describe.**
When viewing posts with multiple images (e.g. https://lemmy.world/post/10765335), viewing each image requires tapping to close the current image, scrolling down, and tapping to view the next.

**Describe the solution you'd like**
While viewing an image, request the ability to swipe to view the next/previous image if multiple are present in a post.

**Describe alternatives you've considered**
The only other option is the current behavior.

**Additional context**
I am no developer, but I believe this is different from https://github.com/aeharding/voyager/issues/677, which requests that multiple images in a post effectively be rendered as a slideshow that occupies the height of a single image, to save vertical post space.

- Device: iPhone 13 Mini (perhaps my tiny phone exacerbates the problem 😀)
- OS: 17.2.1
- Version: 1.36.0

Apollo may have has this feature -- I can't remember. Thanks for reading!