Update dependency tailwindcss to v4

Author: renovate[bot]

package.json

@@ -17,7 +17,7 @@
     "nuxt": "^3.20.0",
     "nuxt-icon": "^0.6.10",
     "prettier": "^3.6.2",
-    "tailwindcss": "^3.4.18"
+    "tailwindcss": "^4.1.16"
   },
   "dependencies": {
     "@formkit/nuxt": "^1.6.9",