add contributing.md file

[INam1995]

hey @Webaddicted91
I would like to request to be assigned the issue for adding a CONTRIBUTING.md file to this Project. This file will provide clear guidelines for potential contributors, enhancing our community's onboarding experience and encouraging more participation.

Here’s a brief overview of what I plan to include in the CONTRIBUTING.md file:

Project Overview
Getting Started instructions
Contributing Guidelines
Implementation steps for the search functionality enhancement
Acknowledgment of the project's Code of Conduct

so please assign this issue to me under gssoc-ext and hacktoberfest'24