docs: update README and example code

[cpunion]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.25%. Comparing base (4466085) to head (b21faf7).
Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main       #4       +/-   ##
===========================================
+ Coverage   62.46%   75.25%   +12.78%     
===========================================
  Files          11       11               
  Lines         389      396        +7     
===========================================
+ Hits          243      298       +55     
+ Misses        130       78       -52     
- Partials       16       20        +4     

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