Add basic styleguide

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/config/styleguide.root.js

@@ -0,0 +1,18 @@
+import VueI18n from 'vue-i18n'
+import messages from '@/i18n/index';
+
+const language = (window.navigator).userLanguage || window.navigator.language;
+const i18n = new VueI18n({
+    locale: language.replace('-', '_'), // set locale
+    messages, // set locale messages
+  });
+
+  export default previewComponent => {
+    // https://vuejs.org/v2/guide/render-function.html
+    return {
+      i18n,
+      render(createElement) {
+        return createElement(previewComponent)
+      }
+    }
+  }