add a hint component

docs/src/main.js

@@ -3,12 +3,14 @@ import 'prismjs/components/prism-jsx.js'
 import 'prismjs/components/prism-scss.js'
 import App from '~/layouts/App'
 import Demo from '~/components/Demo'
+import Hint from '~/components/Hint'
 import Tab from '~/components/Tab'
 import ReactRenderer from '~/components/ReactRenderer'
 
 export default function (Vue, { router, head, isClient }) {
   Vue.component('Layout', App)
   Vue.component('Demo', Demo)
+  Vue.component('Hint', Hint)
   Vue.component('Tab', Tab)
   Vue.component('ReactRenderer', ReactRenderer)
 }