feat: 5205 - new "my prices" page

[monsieurtanuki]

What

• Now the "my prices" page is local - with still an optional link to the web app.
• A good opportunity to refactor a similar page - the "product prices" page.

Screenshots

product prices	my prices

Fixes bug(s)

• Closes: Replicate the 'My Prices' view from the Open Prices web app #5205

Files

Deleted files:

• product_price_item.dart
• product_prices_page.dart

New files:

• get_prices_model.dart: Model that stores what we need to know for "get latest prices" queries.
• price_button.dart: Simple price button: displaying data with optional action.
• price_count_widget.dart: Price Count display.
• price_data_widget.dart: Price Data display (no product data here).
• price_product_widget.dart: Price Product display (no price data here).
• prices_page.dart: Page that displays the latest prices according to a model.

Impacted files:

• labeler.yml: deleted and new files
• prices_card.dart: refactored using new classes
• product_prices_list.dart: refactored using new classes
• user_preferences_account.dart: refactored using new classes

[teolemon]

👍

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 154 lines in your changes missing coverage. Please review.

Project coverage is 7.53%. Comparing base (4d9c7fc) to head (8917386).
Report is 170 commits behind head on develop.

Files	Patch %	Lines
...oth_app/lib/pages/prices/price_product_widget.dart	0.00%	30 Missing ⚠️
...smooth_app/lib/pages/prices/price_data_widget.dart	0.00%	28 Missing ⚠️
...kages/smooth_app/lib/pages/prices/prices_page.dart	0.00%	19 Missing ⚠️
...ages/smooth_app/lib/pages/prices/price_button.dart	0.00%	17 Missing ⚠️
...ooth_app/lib/pages/prices/product_prices_list.dart	0.00%	16 Missing ⚠️
...ib/pages/preferences/user_preferences_account.dart	0.00%	15 Missing ⚠️
...mooth_app/lib/pages/prices/price_count_widget.dart	0.00%	14 Missing ⚠️
...kages/smooth_app/lib/pages/prices/prices_card.dart	0.00%	14 Missing ⚠️
.../smooth_app/lib/pages/prices/get_prices_model.dart	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5347      +/-   ##
==========================================
- Coverage     9.54%   7.53%   -2.01%     
==========================================
  Files          325     377      +52     
  Lines        16411   18968    +2557     
==========================================
- Hits          1567    1430     -137     
- Misses       14844   17538    +2694     

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[monsieurtanuki]

Thank you @teolemon for your review!
With that refactoring, #5198 will be very easy to implement ;)