feat: NutriScore guide with working Share button + Analytics events

[g123k]

Hi everyone,

Here are my changes:

• The share button is now working
• Analytics events when the screen is opened and the share button is clicked
• The screen opens in fullscreen from FAQ

Note: translations seem to take some time to deploy

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 24 lines in your changes are missing coverage. Please review.

Project coverage is 7.73%. Comparing base (4d9c7fc) to head (1d74737).
Report is 146 commits behind head on develop.

Files	Patch %	Lines
...th_app/lib/pages/guides/helpers/guides_footer.dart	0.00%	10 Missing ⚠️
...h_app/lib/pages/guides/helpers/guides_content.dart	0.00%	8 Missing ⚠️
...pp/lib/pages/guides/guide/guide_nutriscore_v2.dart	0.00%	4 Missing ⚠️
packages/smooth_app/lib/main.dart	0.00%	1 Missing ⚠️
...pp/lib/pages/preferences/user_preferences_faq.dart	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5303      +/-   ##
==========================================
- Coverage     9.54%   7.73%   -1.82%     
==========================================
  Files          325     366      +41     
  Lines        16411   18499    +2088     
==========================================
- Hits          1567    1430     -137     
- Misses       14844   17069    +2225     

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