feat: Basic details: explanations about the producer are in a b…

[g123k]

Hi everyone!

There's a new Widget available from the POC: SmoothBanner which allows displaying info at the bottom of the screen.
In this PR, there's also an initial implementation with the producer info on Basic details:

Note: the UltraBlack color was invalid (fixed ✅)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0.97087% with 102 lines in your changes missing coverage. Please review.

Project coverage is 6.83%. Comparing base (4d9c7fc) to head (c55f32e).
Report is 481 commits behind head on develop.

Files with missing lines	Patch %	Lines
..._app/lib/pages/product/add_basic_details_page.dart	0.00%	77 Missing ⚠️
packages/smooth_app/lib/widgets/smooth_banner.dart	0.00%	18 Missing ⚠️
...smooth_app/lib/pages/product/owner_field_info.dart	16.66%	5 Missing ⚠️
.../smooth_app/lib/widgets/v2/smooth_buttons_bar.dart	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5870      +/-   ##
==========================================
- Coverage     9.54%   6.83%   -2.72%     
==========================================
  Files          325     429     +104     
  Lines        16411   23609    +7198     
==========================================
+ Hits          1567    1614      +47     
- Misses       14844   21995    +7151     

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

[teolemon]

Looks good to me. We will probably to color them for other uses with more urgency in the future.

[g123k]

Looks good to me. We will probably to color them for other uses with more urgency in the future.

This one is more for info.
I think we need something different for alerts.