feat: Photo gallery for "Others"

[g123k]

Hi everyone!

Today, the 'Other' view only displays a single photo and does not allow browsing the gallery.
Now, we have:

• a swipe gesture to switch between photos
• network errors are supported
• a details popup shows info about the picture
• an indicator if the photo is outdated

Note: the contributor name is not implemented (waiting for openfoodfacts/openfoodfacts-dart#953)

Video:
Gallery.webm

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 139 lines in your changes missing coverage. Please review.

Project coverage is 7.00%. Comparing base (4d9c7fc) to head (1b701c5).
Report is 258 commits behind head on develop.

Files	Patch %	Lines
..._app/lib/pages/image/product_image_other_page.dart	0.00%	133 Missing ⚠️
.../pages/image/product_image_gallery_other_view.dart	0.00%	5 Missing ⚠️
...ooth_app/lib/pages/image/product_image_widget.dart	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5501      +/-   ##
==========================================
- Coverage     9.54%   7.00%   -2.54%     
==========================================
  Files          325     397      +72     
  Lines        16411   21001    +4590     
==========================================
- Hits          1567    1472      -95     
- Misses       14844   19529    +4685     

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[teolemon]

nice @g123k 👍