LibWeb: Add almost all obsolete but required IDL attributes

As according to https://html.spec.whatwg.org/multipage/obsolete.html
Section 16.3 "Requirements for implementations"

Not all of these attributes are included due to requiring a bit more
functionality.

Libraries/LibWeb/HTML/HTMLFontElement.h

@@ -32,6 +32,8 @@ namespace Web::HTML {
 
 class HTMLFontElement final : public HTMLElement {
 public:
+    using WrapperType = Bindings::HTMLFontElementWrapper;
+
     HTMLFontElement(DOM::Document&, const QualifiedName& qualified_name);
     virtual ~HTMLFontElement() override;