feat: 在綫聊天新增facebook洽談外掛程式 closed #918

feat: 添加artalk評論 closed #933
fix: 修復 開啟 archor 後， facebook評論加載不正確的 bug
fix: 修復 facebook 評論數無法加載的 bug

layout/includes/third-party/card-post-count/artalk.pug

@@ -0,0 +1,20 @@
+- const { server, site } = theme.artalk
+
+script.
+  (() => {
+    const getArtalkCount = () => {
+      const runWidget = () => {
+        Artalk.LoadCountWidget({
+          server: '!{server}',
+          site: '!{site}',
+          countEl: '.artalk-count'
+        })
+      }
+
+      if (typeof Artalk === 'function') runWidget()
+      else getScript('!{theme.asset.artalk_js}').then(runWidget)
+    }
+
+
+    window.pjax ? getArtalkCount() : window.addEventListener('load', getArtalkCount)
+  })()