🚀 Update release management and CHANGELOG

[munechika-koyo]

Key changes include updating the release date for version 0.2.0 in the CHANGELOG, adding a conditional check for deployment in the GitHub Actions workflow, and implementing a new GitHub Actions workflow for automated release management.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.93%. Comparing base (114b3ad) to head (0f62e42).
⚠️ Report is 9 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #19   +/-   ##
=======================================
  Coverage   53.93%   53.93%           
=======================================
  Files          38       38           
  Lines        1780     1780           
  Branches      315      315           
=======================================
  Hits          960      960           
  Misses        700      700           
  Partials      120      120           

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