feat(native fetch): create --experimental-fetch as toggle feature

[syamsudotdev]

Monika Pull Request (PR)

This PR resolves #1237

What feature does this PR add

1. Create --experimental-fetch as toggle feature flag to change HTTP client

How did you implement

1. Added new flag --experimental-fetch
2. Added new tests for startup message

How to test

1. npm run test
2. Compare startup message npm run start with npm run start -- --experimental-fetch

Screenshot

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.49%. Comparing base (d96b3e1) to head (8fd3274).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1240      +/-   ##
==========================================
+ Coverage   63.47%   63.49%   +0.02%     
==========================================
  Files         111      111              
  Lines        3302     3304       +2     
  Branches      568      569       +1     
==========================================
+ Hits         2096     2098       +2     
  Misses       1016     1016              
  Partials      190      190              

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[sapiderman]

Good to go!