feat: Use the search eye animation from the POC

[g123k]

Hi everyone,

To infuse some touches of the POC, here is an opportunity to import the animation mechanism.
To reduce time and memory consumption, the Rive file is loaded as a singleton on top of the hierarchy.

Instead of the wide empty loading screen, I've (temporary) replaced it with:

Link to the animation: https://rive.app/s/lwcPXxyZq0ahW2uldNpfKQ/

TODO (in a later PR): Migrate existing Rive animations with this mechanism

Part of

• 🔍 Search (tracker) #991
• Implement the new search experience #4844

[codecov-commenter]

Codecov Report

Attention: 122 lines in your changes are missing coverage. Please review.

Comparison is base (40f4c0e) 9.85% compared to head (7945e2b) 9.78%.

Files	Patch %	Lines
...kages/smooth_app/lib/resources/app_animations.dart	0.00%	99 Missing ⚠️
...p/lib/pages/product/common/product_query_page.dart	0.00%	15 Missing ⚠️
packages/smooth_app/lib/main.dart	0.00%	6 Missing ⚠️
packages/smooth_app/lib/widgets/smooth_text.dart	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #4833      +/-   ##
==========================================
- Coverage     9.85%   9.78%   -0.08%     
==========================================
  Files          312     313       +1     
  Lines        15839   15954     +115     
==========================================
  Hits          1561    1561              
- Misses       14278   14393     +115     

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