feat(docs) added CONTRIBUTING

CONTRIBUTING.md

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+# Follow Our Updated Guide to See How You Can Contribute
+
+**Hello there! 👋**
+
+We're thrilled that you're eager to contribute to Lib Jitsi Meet! ❤️ 
+
+Your interest in improving our platform means a lot to us. To ensure your contributions align seamlessly with our goals and processes, we've recently updated our guide. This guide will provide you with clear instructions on how to get involved effectively.
+
+### 📖 Get Started
+
+Ready to get started? Head over to our [Jitsi Meet Handbook](https://jitsi.github.io/handbook/docs/dev-guide/dev-guide-contributing/) and let's make Lib Jitsi Meet even better together!
+
+### 💬 Join the Discussion
+
+Have questions or need help? Join our community discussions on the [Jitsi Forum](https://community.jitsi.org/) where contributors and maintainers can assist you.
+
+### ❗️Additional Note
+Before sending us your code, double-check that it meets our coding standards. You can do this by running a command: `npm run lint`. If there are any issues, don't worry! You can fix them by running: `npm run lint-fix`. Once your code passes these checks, feel free to submit your pull request.
+
+**Happy coding!**