docs: add comprehensive contribution guide for microsoft/ML-For-Beginners

docs/CONTRIBUTING_GUIDE.md

@@ -0,0 +1,17 @@
+# Contributing to microsoft/ML-For-Beginners
+
+Thank you for your interest in contributing to **microsoft/ML-For-Beginners**!
+
+## Getting Started
+
+1. Fork the repository
+2. Create your feature branch (`git checkout -b feature/amazing-feature`)
+3. Commit your changes
+4. Push to the branch (`git push origin feature/amazing-feature`)
+5. Open a Pull Request
+
+## Code of Conduct
+
+Please adhere to polite and constructive communication across issues, discussions, and code reviews.
+
+*Updated: 9/4/2026 via GitHub Contribution Automation Tool*