chore: clean up release workflow

[Fei-Guo]

This change renames the workflow and add a manual approval step for making a formal release.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.33%. Comparing base (ecbc2e7) to head (c4a7ca3).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #176   +/-   ##
=======================================
  Coverage   58.33%   58.33%           
=======================================
  Files           5        5           
  Lines         384      384           
=======================================
  Hits          224      224           
  Misses        158      158           
  Partials        2        2           

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