docs: add contributing.md file for contributors

CONTRIBUTING.md

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+# 🤝 How to Contribute
+We welcome contributions from the community! Whether you're fixing a bug, adding a feature, or improving documentation, your help is greatly appreciated.
+
+Please take a moment to read through these guidelines before submitting a pull request or issue.
+
+## 🧩 Contribution Types We Accept
+* Bug fixes
+* New features (must align with project roadmap)
+* Documentation improvements
+* Code refactoring and optimization
+* Testing improvements (unit tests, integration tests)
+* Example use cases or tutorials
+
+## 📌 Forking the Repository
+1. Fork the repository
+2. 
+
+## 📌 Submitting a Pull Request (PR)
+1. Fork the repository from GitHub 
+2. Clone the repository to your local machine
+```bash
+git clone https://github.com/your-username/your-repo.git
+```
+2. Create a new branch :
+```bash
+git checkout -b feature/your-feature-name
+```
+3. Make your changes
+4. Test your changes thoroughly
+5. Commit your changes with a clear and descriptive message:
+```bash
+git commit -m "Fix bug in chatbot response handling"
+```
+6. Push to your fork
+```bash
+git push origin feature/your-feature-name
+```
+7. Open a PR on the original repository
+8. Wait for review and feedback
+9. Please follow the README.md instructions for run and commit the changes.
+
+## 📌 Code Style and Formatting
+* Follow the existing code style and formatting
+* Use meaningful variable and function names
+* Add comments to explain complex code
+* Keep code clean and readable
+
+
+## 📚 Documentation Guidelines
+If you're updating or writing documentation:
+* Use clear and concise language
+* Keep examples simple but practical
+* Ensure all code examples are working and up-to-date
+
+
+## 🐛 Reporting Bugs / Suggesting Features
+Use the GitHub Issues section to report bugs or suggest enhancements.
+
+When reporting a bug, please include:
+
+A clear title and description
+Steps to reproduce
+Expected behavior vs actual behavior
+Environment info (OS, Python version, etc.)
+For feature requests, please describe:
+
+The problem you're trying to solve
+How the feature would improve the project
+Any alternative solutions considered
+📚 Documentation Guidelines
+If you're updating or writing documentation:
+
+Use clear and concise language
+Keep examples simple but practical
+Ensure all code examples are working and up-to-date
+🔐 Licensing
+By contributing to this project, you agree that your contributions will be licensed under the Apache 2.0 License .
+
+All contributions must be your own original work or clearly indicate if derived from another source.
+
+🧑‍⚖️ Code of Conduct
+We expect all contributors to follow our Code of Conduct . Please treat others with respect and keep the environment welcoming and inclusive.
+
+🙌 Thank You!
+Your contribution helps make this project better for everyone. We appreciate your time and effort.