BUG: Broken link to CONTRIBUTING.md results in 404 error

### Is there an existing issue for this?

- [x] I have searched the existing issues

### What happened?

## 📌 Issue Overview
The README file contains a link to CONTRIBUTING.md, but the file does not exist
in the main branch, resulting in a 404 page not found error.

## 🔍 Steps to Reproduce
1. Go to the DevR.AI repository
2. Open the README.md file
3. Click on the CONTRIBUTING.md link
4. A 404 page not found error is shown

## 🎯 Expected Behavior
The CONTRIBUTING.md file should open correctly, or the README should point
to the correct contribution guidelines.

## 🚨 Actual Behavior
The link leads to a 404 page not found error.

## 📷 Screenshot

## 💡 Suggested Improvements
- Add a CONTRIBUTING.md file to the repository, or
- Update the README to link to the correct contribution guide if it exists elsewhere.

### Record

- [x] I agree to follow this project's Code of Conduct
- [x] I want to work on this issue