build: add packages (#1138)

* build(build): build/opt-github-actions-build-productivity

- Reduce the maximum parallel process number to 2(correcsponding to github actions machine cores)

* build(build): build/add-packages-to-release-scope

- Add packages to package.json.file in order to provide theme.scss

package.json

@@ -138,7 +138,8 @@
  },
  "files": [
  "lib",
- "es"
+ "es",
+ "packages"
  ],
  "main": "lib/index.js",
  "module": "lib/index.esm.js",