[DOC] Add Developer Setup Guide

[geetu040]

This PR introduces a new Developer Setup Guide that documents the steps required to set up a local development environment.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 52.78%. Comparing base (f7014e7) to head (b97bcaf).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1635      +/-   ##
==========================================
- Coverage   53.08%   52.78%   -0.30%     
==========================================
  Files          36       36              
  Lines        4357     4357              
==========================================
- Hits         2313     2300      -13     
- Misses       2044     2057      +13     

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[fkiraly]

Great!

Is there some way to credit the authors?

[geetu040]

Is there some way to credit the authors?

yes we definitely should.

@fkiraly would it make sense to add this soon after the main heading on top?

*Author: [Jigyasu](https://github.com/jgyasu)*

[fkiraly]

yes - or @jgyasu could open the PR instead, too?

[jgyasu]

I also think my tone of writing was a bit informal, since now this going to go into the official docs, I will ask an AI to make it formal.