Introduce prettier

[makenowjust]

Fix #146

Changes

• Introduce prettier
• Update workflow to check code format by prettier

[codecov-commenter]

Codecov Report

Merging #152 (74ffeee) into main (3f3b1bd) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main      #152   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           50        50           
  Lines         2297      2297           
  Branches       110       110           
=========================================
  Hits          2297      2297           

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