chore(deps): update devdependency string-width to v8

Author: renovate[bot]

package.json

@@ -124,7 +124,7 @@
     "prettier": "^3.5.3",
     "sentencer": "^0.2.1",
     "std-env": "^3.8.1",
-    "string-width": "^7.2.0",
+    "string-width": "^8.0.0",
     "typescript": "^5.8.2",
     "unbuild": "^3.5.0",
     "vitest": "^3.0.9"