docs: add release notes file for tracking changes

RELEASE.md

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+# Reactfolio Release Notes 🚀
+
+**Reactfolio** is a customizable portfolio template designed for developers looking to showcase their work with style and simplicity. This is the initial release of Reactfolio, setting the foundation for creating an impressive developer portfolio using modern technologies.
+
+## v1.0.0 - Initial Release
+- **React and Vite Setup:** Set up a modern development environment with React and Vite.
+- **TailwindCSS Integration:** Added TailwindCSS for streamlined styling and responsive design.
+- **Basic Project Structure:** Included a basic structure and configuration to kickstart your portfolio.
+- **Documentation:** Provided comprehensive documentation for customization and deployment. [Read the full documentation here](https://github.com/saqibbedar/Reactfolio?tab=readme-ov-file).