Enable Github Pages for this repo

[PierreBesson]

Hi @soxueren,
Currently there is no public website where you can see vue-jdlstudio in action.
I think it would be easy to set up using github pages with the following steps:

1. Set up a npm script called deploy which uses https://github.com/tschaub/gh-pages to deploy the dist/ build to the gh-pages branch
2. Set up Github Pages in repository settings: https://help.github.com/en/articles/configuring-a-publishing-source-for-github-pages#enabling-github-pages-to-publish-your-site-from-master-or-gh-pages
3. When doing a release, also run npm deploy to publish Github pages

If you need help to set it up, I can do a PR to your repo.