A Script file to completely automate the project setup process

# Create a `setup.sh` Script for One-Command Installation

## 📝 Description
EduAid currently requires multiple manual steps for installation and setup. This issue proposes creating a new `setup.sh` script in the root directory that automates the **entire installation process** with a single command.

## 🎯 Goal
Provide an easy-to-use installation script that sets up all dependencies, environments, and services required to run EduAid.

## ✅ Proposed Solution
The new `setup.sh` script should:
1. **Check and install dependencies** (Node.js, Python, npm, curl, tar, etc.).
2. **Create and activate a virtual environment** for the backend.
3. **Install backend dependencies** using `pip install -r requirements.txt`.
4. **Download and extract the Sense2Vec model** if not already present.
5. **Install frontend dependencies** for the web app and extension (`npm install`).
6. **Ensure a smooth developer experience** with minimal manual intervention.