Recognize a <div class="code"> element as a code block AST element.
<div class="code">
Handles both plain code (<pre><code>) and syntax-highlighted code (<div class="hl-main"><pre> with highlight spans).
<pre><code>
<div class="hl-main"><pre>
Recognize a
<div class="code">element as a code block AST element.Handles both plain code (
<pre><code>) and syntax-highlighted code (<div class="hl-main"><pre>with highlight spans).