fix: upgrade node-sass to sass for Node v20 compatibility

- Replace deprecated node-sass with modern sass (Dart Sass)
- node-sass incompatible with Node v20+
- sass works with all Node versions
- No code changes needed, drop-in replacement

package.json

@@ -39,7 +39,7 @@
     "@nuxtjs/vuetify": "^1.12.1",
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-prettier": "^3.4.1",
-    "node-sass": "^5.0.0",
+    "sass": "^1.32.8",
     "prettier": "^2.3.2",
     "sass-loader": "^10.0.1"
   }