[FEAT] Add CONTRIBUTING.md guidelines for new open-source contributors

[mramansayyad]

Feature Request

The project is participating in GirlScript Summer of Code (GSSoC), but it currently lacks a CONTRIBUTING.md file. Adding contribution guidelines is highly recommended to establish standard workflows, branch conventions, and clean coding guidelines.

Proposed Solution

Create a comprehensive CONTRIBUTING.md file including:

• Setup instructions (cloning, installing dependencies)
• Git branch naming conventions (e.g. feat/*, fix/*)
• Code style preferences
• Process for opening issues and submitting pull requests

GSSoC '26

• Yes, I am participating in GirlScript Summer of Code and would like to build this.

[aaniya22]

pls assign this to me under gssoc