add test dependency

Author: sacrosanctic

package.json

@@ -119,6 +119,7 @@
     "@playwright/test": "1.58.1",
     "@storybook/addon-a11y": "^10.2.7",
     "@storybook/addon-docs": "^10.2.7",
+    "@storybook/test": "8.6.15",
     "@types/node": "24.10.9",
     "@types/sanitize-html": "2.16.0",
     "@types/semver": "7.7.1",