chore(deps): update dependency tailwindcss to v4

Author: renovate[bot]

apps/web/package.json

@@ -27,7 +27,7 @@
     "svelte": "4.2.19",
     "svelte-check": "4.1.7",
     "svelte-preprocess": "6.0.3",
-    "tailwindcss": "3.4.17",
+    "tailwindcss": "4.1.6",
     "tslib": "2.8.1",
     "typescript": "5.8.3",
     "vite": "5.4.19"