Add status

docs/intro.md

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+# Status
+This project is no longer maintained. [I am](https://github.com/kof) working on a new tool called [Webstudio](https://github.com/webstudio-is/webstudio). It allows you to visually build and generate optimized CSS and React components along with a [Remix](https://remix.run/) app. Similar to Webflow, but open-source and goes beyond marketing sites.
+
+<a href="https://github.com/webstudio-is/webstudio" target="_blank"><img width="100" src="https://raw.githubusercontent.com/webstudio-is/webstudio-design/main/brand/logo-icon-color.svg"></a>
+
 # Introduction
 
 JSS is an authoring tool for CSS which allows you to use JavaScript to describe styles in a declarative, conflict-free and reusable way. It can compile in the browser, server-side or at build time in Node.