Add CONTRIBUTING.md for community profile

CONTRIBUTING.md

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+# Contributing to Universal Computer
+
+Thanks for your interest in contributing! This project is part of the [BlackRoad](https://blackroad.io) ecosystem.
+
+## Getting Started
+
+1. Fork the repository
+2. Create a feature branch: `git checkout -b feature/your-feature`
+3. Make your changes
+4. Run tests if available: `npm test` or `python -m pytest`
+5. Commit: `git commit -m "Add your feature"`
+6. Push: `git push origin feature/your-feature`
+7. Open a Pull Request
+
+## Code Style
+
+- Follow existing code conventions in the project
+- Keep commits atomic and well-described
+- Add tests for new functionality when possible
+
+## Reporting Issues
+
+- Use GitHub Issues to report bugs
+- Include steps to reproduce, expected behavior, and actual behavior
+- Include system info (OS, Node/Python version) when relevant
+
+## License
+
+By contributing, you agree that your contributions will be licensed under the MIT License.