chore: Migration to Flutter 3.16

[g123k]

Hi everyone,

It's now safe to migrate to Flutter 3.16.

The only change is related to WillPopScope, which is now deprecated.
There are lots of complaints on the official tracker, but I've created a WillPopScope2 with the same kind of feature.

BUT there is a change: we now need to pass 2 values:

• a boolean that says if we want to close or not the page
• a value that we want to pass, to the pop() method - for now, it's always null, but the API is ready

[M123-dev]

Thanks @g123k ! 😄

[teolemon]

Run dart format --set-exit-if-changed .
Formatted packages/smooth_app/lib/pages/product/add_basic_details_page.dart
Formatted packages/smooth_app/lib/pages/product/portion_calculator.dart
Formatted packages/smooth_app/lib/widgets/will_pop_scope.dart
Formatted 394 files (3 changed) in 1.65 seconds.
Error: Process completed with exit code 1.

[g123k]

Blocked by openfoodfacts/openfoodfacts_flutter_lints#4

[codecov-commenter]

Codecov Report

Attention: 35 lines in your changes are missing coverage. Please review.

Comparison is base (e0b3111) 9.66% compared to head (cf5c0fe) 9.66%.

Files	Patch %	Lines
...ackages/smooth_app/lib/widgets/will_pop_scope.dart	0.00%	9 Missing ⚠️
packages/smooth_app/lib/pages/crop_page.dart	0.00%	2 Missing ⚠️
...ib/pages/onboarding/onboarding_flow_navigator.dart	0.00%	2 Missing ⚠️
..._app/lib/pages/product/add_basic_details_page.dart	0.00%	2 Missing ⚠️
...th_app/lib/pages/product/add_new_product_page.dart	0.00%	2 Missing ⚠️
..._app/lib/pages/product/add_other_details_page.dart	0.00%	2 Missing ⚠️
...pp/lib/pages/product/common/product_list_page.dart	0.00%	2 Missing ⚠️
...oth_app/lib/pages/product/edit_new_packagings.dart	0.00%	2 Missing ⚠️
...h_app/lib/pages/product/nutrition_page_loaded.dart	0.00%	2 Missing ⚠️
...mooth_app/lib/pages/product/simple_input_page.dart	0.00%	2 Missing ⚠️
... and 8 more

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #4917      +/-   ##
==========================================
- Coverage     9.66%   9.66%   -0.01%     
==========================================
  Files          322     323       +1     
  Lines        16177   16187      +10     
==========================================
  Hits          1564    1564              
- Misses       14613   14623      +10     

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[g123k]

The build is now OK 👌