feat: 5335 - owner field icon/info for "categories"

[monsieurtanuki]

What

• Now we display the "owner field" icon and info for "categories", when relevant.

Screenshots

"categories" page	"multi" page (top)	"multi" page (lower)

Fixes bug(s)

• Closes: #5335

Impacted files

• add_basic_details_page.dart: minor refactoring
• nutrition_page_loaded.dart: minor refactoring
• owner_field_info.dart: new class OwnerFieldIcon
• simple_input_page.dart: now displays an OwnerFieldInfo if there's at least one owner field
• simple_input_page_helpers.dart: new method bool isOwnerField
• simple_input_text_field.dart: minor refactoring
• simple_input_widget.dart: now displays an OwnerFieldIcon if it's an owner field

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 7.14286% with 13 lines in your changes missing coverage. Please review.

Project coverage is 6.92%. Comparing base (4d9c7fc) to head (db23850). Report is 471 commits behind head on develop.

Files with missing lines	Patch %	Lines
...p/lib/pages/product/simple_input_page_helpers.dart	0.00%	5 Missing :warning:
...smooth_app/lib/pages/product/owner_field_info.dart	25.00%	3 Missing :warning:
...mooth_app/lib/pages/product/simple_input_page.dart	0.00%	3 Missing :warning:
...app/lib/pages/product/simple_input_text_field.dart	0.00%	1 Missing :warning:
...oth_app/lib/pages/product/simple_input_widget.dart	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #5845 +/- ## ========================================== - Coverage 9.54% 6.92% -2.63% ========================================== Files 325 422 +97 Lines 16411 23263 +6852 ========================================== + Hits 1567 1611 +44 - Misses 14844 21652 +6808 ```

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