feat: add Blog section to doc sidebar with 2 article links

Author: TreeLin

_layouts/doc.html

@@ -142,6 +142,12 @@
       <a href="/workshop/" {% if page.url == '/workshop/' %}class="active"{% endif %}>Workshop</a>
       <a href="/showcase/" {% if page.url == '/showcase/' %}class="active"{% endif %}>用户案例</a>
     </div>
+    <div class="sidebar-section">
+      <div class="sidebar-title">Blog</div>
+      <a href="/blog/" {% if page.url == '/blog/' %}class="active"{% endif %}>全部文章</a>
+      <a href="/blog/qwencode-bailian-ai-marketing/" {% if page.url == '/blog/qwencode-bailian-ai-marketing/' %}class="active"{% endif %}>电商营销全流程</a>
+      <a href="/blog/qwencode-mpcover-skill-guide/" {% if page.url == '/blog/qwencode-mpcover-skill-guide/' %}class="active"{% endif %}>公众号封面生成</a>
+    </div>
     <div class="sidebar-section">
       <div class="sidebar-title">帮助</div>
       <a href="/faq/" {% if page.url == '/faq/' %}class="active"{% endif %}>FAQ</a>