Add Perl + MongoDB Quickstart (Addressed review feedback)

[Akshat005Chaudhary]

Summary

This PR re-submits the Perl + MongoDB Quickstart after addressing feedback from the previous review.

Ref: #774

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Updates Based on Review

1. Yes keploy record and keploy test usage for both Docker and local setups are clearly documented for the ease of beginners, with explicit references to sections being attacked below.

Keploy Record in local setup

Keploy Test in local setup

Keploy Record in Docker setup

Keploy Test in Docker setup

2. Confirmed the correctness of sidebar entry, denying any concerns regarding removal or tampering of the sidebar entry instrumental for the guide to be discoverable in the docs navigation.

3. The Perl+MongoDB sample app reference in the guide is confirmed to be publicly accessible and the running of the application is reproducible in a clean environment.
4. I have rebased on latest main and resolved merge conflicts
5. Furthermore, the quickstart guide provided follows consistent narrative style and structure with overall docs enhancing readability and usage.

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Notes

All feedback from the previous review has been addressed.
Happy to make further improvements if needed.

[Akshat005Chaudhary]

Hi @amaan-bhati , resubmitting this PR after addressing all previous review comments (Ref: #774). Would appreciate another look.