Migrate NotFound component to tailwind

package.json

@@ -54,6 +54,7 @@
   "devDependencies": {
     "@shlinkio/eslint-config-js-coding-standard": "~3.5.0",
     "@stylistic/eslint-plugin": "^4.2.0",
+    "@tailwindcss/vite": "^4.0.17",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.3.0",
     "@testing-library/user-event": "^14.6.1",
@@ -75,6 +76,7 @@
     "history": "^5.3.0",
     "jsdom": "^26.0.0",
     "sass": "^1.86.3",
+    "tailwindcss": "^4.0.17",
     "typescript": "^5.8.3",
     "typescript-eslint": "^8.29.0",
     "vite": "^6.2.5",