Added HACKTOBERFEST.md welcome file for new contestants

Author: sachinkanishka

HACKTOBERFEST.md

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+# Welcome to ReactPlay for Hacktoberfest!
+
+Thank you for joining the ReactPlay open-source community during Hacktoberfest 2025! 🎉
+
+ReactPlay is an open-source web app designed to help you learn ReactJS through hands-on projects. Whether you're here to learn, create, or contribute, your participation is valuable.
+
+## Important Points for Hacktoberfest Contributors
+
+- **How to Contribute**
+  - Fork the `react-play` repository.
+  - Clone your fork locally and set up the project for development.
+  - Create or improve ReactJS projects called "Plays" and share your code.
+  - Follow the [`CONTRIBUTING.md`](./CONTRIBUTING.md) for guidelines and the code review process.
+  - Ensure your pull requests are meaningful, respectful, and adhere to coding standards.
+  - Run linting and tests as described in the contribution guide before submitting your PR.
+
+- **Environment Setup**
+  - Use Node.js version 16.x or higher.
+  - Install dependencies using `yarn install` (recommended) or `npm install`.
+  - Start the app locally with `yarn start` or `npm start` for live development.
+  
+- **Code Quality**
+  - The project runs ESLint and formatting checks automatically.
+  - Fix any lint errors with `yarn run lint:fix` or `npm run lint:fix`.
+  - Format your code using `yarn run format` or `npm run format`.
+  - Pull requests with lint errors may not be reviewed or accepted.
+
+- **Getting Help**
+  - Check the issues to find new feature requests or bugs to work on.
+  - Ask questions or request help via GitHub issues or the ReactPlay community channels.
+  - Read the official ReactPlay [docs](https://docs.reactplay.io) and Watch the [YouTube guide](https://www.youtube.com/watch?v=h8suY-Osn8Q) for repository management.
+
+- **Rewards and Recognition**
+  - Your contributions will be recognized publicly and you can claim special ReactPlay badges.
+  - Show your ReactPlay badges with pride to inspire others.
+  
+## Quick Links
+
+- [ReactPlay Demo](https://reactplay.io) — Explore the app live
+- [Contribution Guide](./CONTRIBUTING.md) — Learn how to contribute the right way
+- [Code of Conduct](CODE_OF_CONDUCT.md) — Our community values
+- [Claim Your Hacktoberfest Reward Badge](https://aviyel.com/projects/43/reactplay/rewards)
+
+Let's learn, create, and grow together with ReactPlay!
+
+Happy Hacktoberfest and happy coding! 
+
+