feat: UI Improvements for the photo gallery

[g123k]

Hi everyone!

Here are a few changes to the photo gallery. 🎥 https://github.com/user-attachments/assets/91d52794-a613-4ee7-97ed-f0a8ff30a38e

• The "Take a picture" button (was in the FAB) is moved into the AppBar

• The language picker is also in the AppBar  

• The grid layout is changed

• The indicator on the left is green (up-to-date photo), orange (maybe outdated), red (no picture available)

• The type is on top and not below

• The text is not shrunk  

• The image is not centered anymore and uses the same effect as the product page.

File changes:

• product_title_card.dart: everything related to the product picture is removed from this file
• smooth_product_image.dart: the code from product_title_card.dart + new features
• product_cards_helper.dart: the "ProductAppBar" can have actions and a bottom widget
• product_image_widget.dart: in the grid, the obsolete icon is now orange
• product_image_gallery_view.dart: use the new layout
• product_image_viewer.dart: add a Hero animation
• app_icons.dart: two variants for the CircledArrow
• smooth_theme.dart: instead of Theme.of().extension<>…!, we can use context.extension<>()
• smooth_app_bar.dart: the foreground color was not passed correctly to the title

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 2.59259% with 263 lines in your changes missing coverage. Please review.

Project coverage is 6.90%. Comparing base (4d9c7fc) to head (2cd4a35). Report is 477 commits behind head on develop.

Files with missing lines	Patch %	Lines
.../lib/cards/product_cards/smooth_product_image.dart	0.00%	144 Missing :warning:
.../lib/pages/product/product_image_gallery_view.dart	0.00%	78 Missing :warning:
packages/smooth_app/lib/resources/app_icons.dart	4.76%	20 Missing :warning:
...pp/lib/cards/product_cards/product_title_card.dart	0.00%	13 Missing :warning:
...ooth_app/lib/pages/image/product_image_widget.dart	0.00%	2 Missing :warning:
...ib/pages/product/product_image_swipeable_view.dart	0.00%	2 Missing :warning:
...th_app/lib/pages/product/product_image_viewer.dart	0.00%	2 Missing :warning:
packages/smooth_app/lib/themes/smooth_theme.dart	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #5852 +/- ## ========================================== - Coverage 9.54% 6.90% -2.65% ========================================== Files 325 423 +98 Lines 16411 23352 +6941 ========================================== + Hits 1567 1612 +45 - Misses 14844 21740 +6896 ```

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