message: chore: add build storybook script at root package
diff: "test": "cross-env CI=true lerna run test -- --coverage",
  "create-plugin": "backstage-cli create-plugin",
  "lint": "lerna run lint",
  - "storybook": "yarn workspace @spotify-backstage/core storybook"
  + "storybook": "yarn workspace @spotify-backstage/core storybook",
  + "build-storybook": "yarn workspace @spotify-backstage/core build-storybook"
  },
  "workspaces": {
  "packages": [
  