Attempt at comments for documentation

docs/.vuepress/components/Comments.vue

@@ -0,0 +1,31 @@
+<template></template>
+
+<script>
+export default {
+  destroyed() {
+    // remove comments section. It seems that utteranc does not support SPA
+    const utterances = document.querySelectorAll(".utterances");
+    const remove = e => e.parentElement.removeChild(e);
+
+    if (!!utterances) {
+      for (let i = 0; i < utterances.length; i++) {
+        remove(utterances[i]);
+      }
+    }
+  },
+  mounted() {
+    // this script adds HTML element and removes self
+    const script = document.createElement("script");
+    script.setAttribute("src", "https://utteranc.es/client.js");
+    script.setAttribute("repo", "noties/Markwon");
+    script.setAttribute("issue-term", "pathname");
+    script.setAttribute("label", "doc-comments");
+    script.setAttribute("theme", "github-light");
+    script.setAttribute("crossorigin", "anonymous");
+    script.setAttribute("async", true);
+
+    const page = document.querySelectorAll(".page")[0];
+    page.appendChild(script);
+  }
+};
+</script>

docs/docs/v3/core/getting-started.md

@@ -63,3 +63,5 @@ This section is kept due to historical reasons. Starting with version <Badge tex
 the amount of magic is reduced. To leverage your `Markwon` usage a concept of `Plugin`
 is introduced which helps to extend default behavior in a simple and _no-breaking-the-flow_ manner.
 Head to the [next section](/docs/v3/core/plugins.md) to know more.
+
+<Comments />