message: app: use cli app:test + copyright header
diff: "scripts": {
  "start": "cross-env EXTEND_ESLINT=true SKIP_PREFLIGHT_CHECK=true backstage-cli watch-deps -- react-scripts start",
  "build": "cross-env EXTEND_ESLINT=true SKIP_PREFLIGHT_CHECK=true react-scripts build",
  - "test": "cross-env EXTEND_ESLINT=true SKIP_PREFLIGHT_CHECK=true react-scripts test",
  + "test": "backstage-cli app:test",
  "lint": "backstage-cli app:lint"
  },
  "browserslist": {
  