feat: 添加 artitalk 説説插件

style: 主題文件分類調正

layout/includes/page/artitalk.pug

@@ -0,0 +1 @@
+#artitalk_main

layout/includes/page/categories.pug

@@ -0,0 +1,5 @@
+.category-lists
+  .category-title.is-center= _p('page.category')
+    |  - 
+    span.category-amount= site.categories.length
+  div!= list_categories()

layout/includes/page/default-page.pug

@@ -0,0 +1,6 @@
+if theme.douban && theme.douban.meta && doubanExist
+  meta(name="referrer" content="no-referrer")
+#article-container
+  if top_img === false
+    h1.page-title= page.title
+  != page.content