fix: change utils file to js

[Jshhhh]

Problem

change utils file extension to js to prevent duplicate utils files in apps\

[codecov-commenter]

Codecov Report

Merging #1126 (d958ee4) into main (0cfef0f) will not change coverage.
The diff coverage is 100.00%.

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@@           Coverage Diff           @@
##             main    #1126   +/-   ##
=======================================
  Coverage   93.84%   93.84%           
=======================================
  Files         149      149           
  Lines        6091     6091           
  Branches     1835     1835           
=======================================
  Hits         5716     5716           
  Misses        357      357           
  Partials       18       18           

Files	Coverage Δ
...-react/lib/react-utils-studio-template-renderer.ts	95.00% <100.00%> (ø)

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