feat: Nutrition page (auto-focus on new fields + owner field)

[g123k]

Hi everyone!

This PR changes 2 behaviors on the nutrition page:

• When a new field is added (eg: calcium), the focus will be moved to the text field
• For the owner field icon, it opens the modal sheet with explanations

Video:

ScreenRecording_01-16-2025.02-54-20_1.MP4

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 22 lines in your changes missing coverage. Please review.

Project coverage is 6.20%. Comparing base (4d9c7fc) to head (db03640).
Report is 670 commits behind head on develop.

Files with missing lines	Patch %	Lines
...h_app/lib/pages/product/nutrition_page_loaded.dart	0.00%	21 Missing ⚠️
...b/pages/product/nutrition_add_nutrient_button.dart	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #6218      +/-   ##
==========================================
- Coverage     9.54%   6.20%   -3.35%     
==========================================
  Files          325     456     +131     
  Lines        16411   26692   +10281     
==========================================
+ Hits          1567    1656      +89     
- Misses       14844   25036   +10192     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[monsieurtanuki]

Hi @g123k!
Please have a look at my comments.

[monsieurtanuki]

Thank you @g123k for your changes!
Still not convinced by your unexpected dispose calls, but as I currently have limited ways of reviewing and as you've confirmed it's ok, that's good enough for me!