feat: 增加Twikoo評論 #402

improvement: 滾動到評論按鈕只要用評論的頁面就出現
improvement: aside狀態存localstore
fix: 修復disqusjs沒有設置api時，沒有反代的bugs
fix: 修復aside在font-matter aside為false時，收縮按鈕依舊出現和點擊按鈕會出現空白的bugs #398

layout/includes/third-party/comments/twikoo.pug

@@ -0,0 +1,24 @@
+script.
+  function loadTwikoo () {
+    function init () {
+      twikoo.init({ 
+        envId: '!{theme.twikoo}' 
+      })
+    }
+
+    if (typeof twikoo.init === 'function') {
+      init()
+    } else {
+      $.getScript('!{theme.CDN.twikoo}', init)
+    }
+  }
+
+  if ('!{theme.comments.use[0]}' === 'Twikoo' || !!{theme.comments.lazyload}) {
+    if (!{theme.comments.lazyload}) btf.loadComment(document.getElementById('twikoo'), loadTwikoo)
+    else loadTwikoo()
+  } else {
+    function loadOtherComment () {
+      loadTwikoo()
+    }
+  }
+