feat: add optional date display (zigcc#62)

Author: xihale

content/monthly/index.smd

@@ -4,6 +4,9 @@
 .author = "ZigCC",
 .layout = "monthly.shtml",
 .draft = false,
+.custom = {
+  .showTocDate = false
+}
 ---
 
 社区内的最新进展，信息来源：[Zig NEWS](https://zig.news/top/month)、[Zig

layouts/templates/content.shtml

@@ -10,7 +10,15 @@
     <p :text="$page.author" id="author"></p>
   </div>
   <ul :loop="$page.subpages()">
-    <a href="$loop.it.link()"><li :text="$loop.it.title"></li></a>
+    <a href="$loop.it.link()">
+      <li>
+        <span :if="$page.custom.getOr('showTocDate', true)">
+          <span :text="$loop.it.date.format('06-01-03')"></span>
+           &nbsp;
+        </span>
+        <span :text="$loop.it.title"></span>
+      </li>
+    </a>
   </ul>
   <div class="docs" :if="$page.custom.getOr('toc', true).and($page.isSection().not())">
     <h1>Table of Contents</h1>