chore: updating --esm to flag instead of boolean

[aavinash-nr]

Description:

• This PR modifies --esm from boolean to flag.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.52%. Comparing base (930f72b) to head (d7d4c46).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #322   +/-   ##
=======================================
  Coverage   75.52%   75.52%           
=======================================
  Files          18       18           
  Lines        1577     1577           
=======================================
  Hits         1191     1191           
  Misses        386      386           

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