feat(design-system): scaffold shadcn/ui — components.json + cn() (Sprint 0.5 étape 3)

components.json

@@ -0,0 +1,21 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "new-york",
+  "rsc": false,
+  "tsx": true,
+  "tailwind": {
+    "config": "",
+    "css": "src/index.css",
+    "baseColor": "slate",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "aliases": {
+    "components": "@/shared/components",
+    "utils": "@/shared/lib/utils",
+    "ui": "@/shared/components/ui",
+    "lib": "@/shared/lib",
+    "hooks": "@/shared/hooks"
+  },
+  "iconLibrary": "lucide"
+}

src/shared/lib/utils.ts

@@ -0,0 +1,6 @@
+import { type ClassValue, clsx } from 'clsx'
+import { twMerge } from 'tailwind-merge'
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs))
+}