add comment system

override/partials/comments.html

@@ -0,0 +1,50 @@
+{% if page.meta.comments %}
+  <h2 id="__comments">{{ lang.t("meta.comments") }}</h2>
+  <!-- Insert generated snippet here -->
+  <script src="https://giscus.app/client.js"
+    data-repo="fromitive/fromitive-blog"
+    data-repo-id="R_kgDOJ4LF1g"
+    data-category="Q&A"
+    data-category-id="DIC_kwDOJ4LF1s4CXvhy"
+    data-mapping="pathname"
+    data-strict="0"
+    data-reactions-enabled="1"
+    data-emit-metadata="0"
+    data-input-position="bottom"
+    data-theme="dark_dimmed"
+    data-lang="ko"
+    crossorigin="anonymous"
+    async>
+</script>
+  <!-- Synchronize Giscus theme with palette -->
+  <script>
+    var giscus = document.querySelector("script[src*=giscus]")
+
+    /* Set palette on initial load */
+    var palette = __md_get("__palette")
+    if (palette && typeof palette.color === "object") {
+      var theme = palette.color.scheme === "slate" ? "dark" : "light"
+      giscus.setAttribute("data-theme", theme) 
+
+
+    }
+
+    /* Register event handlers after documented loaded */
+    document.addEventListener("DOMContentLoaded", function() {
+      var ref = document.querySelector("[data-md-component=palette]")
+      ref.addEventListener("change", function() {
+        var palette = __md_get("__palette")
+        if (palette && typeof palette.color === "object") {
+          var theme = palette.color.scheme === "slate" ? "dark" : "light"
+
+          /* Instruct Giscus to change theme */
+          var frame = document.querySelector(".giscus-frame")
+          frame.contentWindow.postMessage(
+            { giscus: { setConfig: { theme } } },
+            "https://giscus.app"
+          )
+        }
+      })
+    })
+  </script>
+{% endif %}