feat: request assets in a separate thread

[dfguerrerom]

• do the request of the assets in a separate thread, loading the component and not waiting to the response, it will be blocked until it receives all the data

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 68.25397% with 20 lines in your changes missing coverage. Please review.

Project coverage is 96.00%. Comparing base (a6431bb) to head (1c9a591).

Files with missing lines	Patch %	Lines
sepal_ui/scripts/thread_controller.py	65.51%	20 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #954      +/-   ##
==========================================
- Coverage   96.31%   96.00%   -0.32%     
==========================================
  Files          39       40       +1     
  Lines        4015     4075      +60     
==========================================
+ Hits         3867     3912      +45     
- Misses        148      163      +15     

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