fix: write an end-to-end contribution flow

[yassinedorbozgithub]

Motivation

The main motivation of this PR is to updating the contributing.md file in goal to include the end-to-end contribution flow is designed to make teamwork smoother and more efficient. It starts with creating a branch for your changes, followed by coding and testing your updates. Once ready, you submit a Pull Request (PR) for review. Team members can then review, suggest improvements, and approve the changes. After approval, the updates are merged into the main project. This clear, step-by-step process ensures everyone is on the same page, reduces errors, and helps the team achieve its goals faster 🚀

Fixes #749

[medtaher123]

Nice addition! This will help new contributors get started easily.
One thing to consider: some people might not be familiar with the forking process when contributing to open-source projects. It might be helpful to mention that they should first fork the repository, create a branch in their fork, and then submit a PR from there.

A small clarification like this could make the guide even more beginner-friendly! What do you think? 😊

[yassinedorbozgithub]

Hi @medtaher123, yes it's a good idea we will add a fork section