docs: Add vuepress with initial docs (#99)

Co-authored-by: Tiffany Le-Nguyen <tlenguyen@expedia.com>
Co-authored-by: Matan Kushner <hello@matchai.me>

docs/.vuepress/config.js

@@ -0,0 +1,28 @@
+module.exports = {
+  title: 'Starship',
+  description: 'The cross-shell prompt for astronauts ☄🌌️',
+  head: [
+    ['link', { rel: 'icon', href: '/icon.png' }]
+  ],
+  themeConfig: {
+    logo: '/icon.png',
+    sidebar: [
+      '/',
+      ['/guide/', 'Guide'],
+      ['/config/', 'Configuration']
+    ],
+    nav: [
+      { text: 'Configuration', link: '/config/' },
+    ],
+    // the GitHub repo path
+    repo: 'starship/starship',
+    // the label linking to the repo
+    repoLabel: 'GitHub',
+    // if your docs are not at the root of the repo:
+    docsDir: 'docs',
+    // defaults to false, set to true to enable
+    editLinks: true,
+    // custom text for edit link. Defaults to "Edit this page"
+    editLinkText: 'Edit this page on GitHub'
+  }
+}