Add doctest for Search Quickstart

[uglide]

• Add doctest for Search Quickstart
• Add GitHub Actions workflow for testing doctests

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -0.03 ⚠️

Comparison is base (7d2b006) 93.27% compared to head (3a43326) 93.25%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #134      +/-   ##
==========================================
- Coverage   93.27%   93.25%   -0.03%     
==========================================
  Files          78       78              
  Lines        4625     4625              
  Branches      426      426              
==========================================
- Hits         4314     4313       -1     
  Misses        189      189              
- Partials      122      123       +1     

see 1 file with indirect coverage changes

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