fix(ImagePreview): allow user to swipe to next image when the current image is moved to the edge

[inottn]

relate PR: #12660

Vertical scrolling also involves the logic when the image is moved to the edge.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 89.78%. Comparing base (2b9abfe) to head (f5465e2).

Files	Patch %	Lines
...ckages/vant/src/image-preview/ImagePreviewItem.tsx	0.00%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12666      +/-   ##
==========================================
- Coverage   89.85%   89.78%   -0.08%     
==========================================
  Files         257      257              
  Lines        6830     6832       +2     
  Branches     1657     1659       +2     
==========================================
- Hits         6137     6134       -3     
- Misses        368      373       +5     
  Partials      325      325              

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[chenjiahan]

Nice 😄