Added Code Review Guide for issue #429

[konaspandana017]

Summary
Added a new Code Review Guide under common-docs/code-review-guide.md that complements existing CodeYourFuture reviewing guides.

Related Issue
Closes #429 — “Write / Build Code review guide/site/app/video/something”

Details
This guide helps trainees and contributors understand how to review code effectively. It includes:

Purpose and importance of code reviews

Step-by-step process for reviewing code

Example review comments

Links to useful resources and existing CodeYourFuture guides

Checklist for reviewers

Related Guides

CodeYourFuture Reviewing Guide

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[cjyuan]

These are useful advice. Some of the points might have already been covered in the "Code Review Guide" and "Things to look for in a code review":

• https://github.com/CodeYourFuture/curriculum/tree/main/org-cyf-guides/content/reviewing
• https://github.com/CodeYourFuture/curriculum/tree/main/org-cyf-guides/content/reviewing/checklist

You can view the corresponding rendered pages on

• https://programming.codeyourfuture.io/guides/reviewing/
• https://programming.codeyourfuture.io/guides/reviewing/checklist/

Can you help integrate your guide with the existing guides?

[illicitonion]

Thanks for looking at this!

I think we'd rather improve the existing guides (by making edits to the existing files in https://github.com/CodeYourFuture/curriculum/tree/main/org-cyf-guides/content/reviewing) rather than adding new guides.

Please can you take a look at the existing guides and see if there are any edits you want to suggest to them, rather than writing another page with copies of some of the same ideas?

Thank you!