feat(logger): add slog Logger implementation

[reugn]

• Implement the Logger interface using the standard library's slog package for logging
• Require go 1.21

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.67%. Comparing base (21cefa7) to head (f6968f6).
Report is 1 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #152      +/-   ##
==========================================
+ Coverage   94.53%   94.67%   +0.14%     
==========================================
  Files          19       20       +1     
  Lines        1207     1239      +32     
==========================================
+ Hits         1141     1173      +32     
  Misses         48       48              
  Partials       18       18              

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