feat(v2): @docusaurus/init package (#1655)

* feat(v2): separate v2 docusaurus/init package

* nits

* docs

* rm unwanted

* readme

packages/docusaurus-init/templates/classic/blog/2019-05-28-hola.md

@@ -0,0 +1,11 @@
+---
+title: Hola
+author: Gao Wei
+authorTitle: Docusaurus Core Team
+authorURL: https://github.com/wgao19
+authorImageURL: https://avatars1.githubusercontent.com/u/2055384?v=4
+authorTwitter: wgao19
+tags: [hola, docusaurus]
+---
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque elementum dignissim ultricies. Fusce rhoncus ipsum tempor eros aliquam consequat. Lorem ipsum dolor sit amet

packages/docusaurus-init/templates/classic/blog/2019-05-29-hello-world.md

@@ -0,0 +1,17 @@
+---
+title: Hello
+author: Endilie Yacop Sucipto
+authorTitle: Maintainer of Docusaurus
+authorURL: https://github.com/endiliey
+authorImageURL: https://avatars1.githubusercontent.com/u/17883920?s=460&v=4
+authorTwitter: endiliey
+tags: [hello, docusaurus]
+---
+
+Welcome to this blog. This blog is created with [**Docusaurus 2 alpha**](https://v2.docusaurus.io/).
+
+<!--truncate-->
+
+This is a test post.
+
+A whole bunch of other information.

packages/docusaurus-init/templates/classic/blog/2019-05-30-welcome.md

@@ -0,0 +1,13 @@
+---
+title: Welcome
+author: Yangshun Tay
+authorTitle: Front End Engineer @ Facebook
+authorURL: https://github.com/yangshun
+authorImageURL: https://avatars0.githubusercontent.com/u/1315101?s=400&v=4
+authorTwitter: yangshunz
+tags: [facebook, hello, docusaurus]
+---
+
+Blog features are powered by the blog plugin. Simple add files to the `blog` directory. It supports tags as well!
+
+Delete the whole directory if you don't want the blog features. As simple as that!