init product detail component

static/components/product-detail/product-detail.html

@@ -0,0 +1 @@
+<div></div>

static/components/product-detail/product-detail.js

@@ -0,0 +1,13 @@
+async function productDetail(path) {
+  const template = await loadTemplateAsync(path)
+  Vue.component('product-detail', {
+    name: 'product-detail',
+    template,
+
+    props: ['product'],
+    data: function () {
+      return {}
+    },
+    methods: {}
+  })
+}