LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr

Author: https://github.com/mattco98
Commit: 7c0c1c8f49
Pull-request: https://github.com/SerenityOS/serenity/pull/17743
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibWeb/DOM/StaticNodeList.cpp

@@ -42,7 +42,7 @@ Node const* StaticNodeList::item(u32 index) const
     // The item(index) method must return the indexth node in the collection. If there is no indexth node in the collection, then the method must return null.
     if (index >= m_static_nodes.size())
         return nullptr;
-    return &m_static_nodes[index];
+    return m_static_nodes[index];
 }
 
 // https://dom.spec.whatwg.org/#ref-for-dfn-supported-property-indices