message: build(docs-infra): ensure root node_modules exists
  Now that the doc-gen parses the imports of TS source
  files we need to ensure that the root node_modules
  exists. Otherwise running `yarn docs` produces an
  obscure error:
  ```
  Error: No SourceFile found with path node_modules/@types/jasmine/index.d.ts
  ```
  Closes
  PR Close
diff: "test": "yarn check-env && ng test",
  "pree2e": "yarn check-env && yarn update-webdriver",
  "e2e": "ng e2e --no-webdriver-update",
  - "presetup": "yarn install --frozen-lockfile && yarn ~~check-env && yarn boilerplate:remove",
  + "presetup": "yarn --cwd .. install && yarn install --frozen-lockfile && yarn ~~check-env && yarn boilerplate:remove",
  "setup": "yarn aio-use-npm && yarn example-use-npm",
  "postsetup": "yarn boilerplate:add && yarn build-ie-polyfills && yarn docs",
  "presetup-local": "yarn presetup",
  