LibWeb: Don't create a layout node for <noscript> when scripting enabled

This makes stuff inside <noscript> correctly not show up since we run
with scripting enabled.

In the future, we can add a way to disable scripting, but for now,
Document::is_scripting_enabled() just returns true.

Libraries/LibWeb/DOM/Document.h

@@ -57,6 +57,8 @@ public:
 
     Origin origin() const;
 
+    bool is_scripting_enabled() const { return true; }
+
     URL complete_url(const String&) const;
 
     void fixup();