Add home to the gitbook website

Author: garronej

stories/intro.stories.mdx

@@ -0,0 +1,23 @@
+import { Meta } from "@storybook/addon-docs";
+import { useDarkMode } from "storybook-dark-mode";
+
+<Meta
+    title="🇫🇷 Introduction" 
+    parameters={{
+        "viewMode": "docs",
+        "previewTabs": {
+            "canvas": { "hidden": true },
+            "zoom": { "hidden": true },
+            "storybook/background": { "hidden": true },
+            "storybook/viewport": { "hidden": true },
+        },
+    }}
+/>
+
+<div style={{ "margin": "0 auto", "maxWidth": "600px", "textAlign": "center" }}>
+    <img src="repo-card.png" />  
+    🇫🇷 <i><a href="https://www.systeme-de-design.gouv.fr/">French State Design System</a> React integration</i> 🇫🇷 
+
+This website is a playground to test the React components of [@codegouvfr/react-dsfr](https://github.com/codegouvfr/react-dsfr).  
+If you're just getting started heads over to the [main documentation website](https://etalab-2.gitbook.io/dsfr-react/).
+</div>