LibWeb: Add Support for the ARIA Element Properties

Element now supports getting and setting ARIA properties from
JS and HTML.

Userland/Libraries/LibWeb/HTML/HTMLTableElement.h

@@ -42,6 +42,9 @@ public:
     WebIDL::ExceptionOr<JS::NonnullGCPtr<HTMLTableRowElement>> insert_row(long index);
     WebIDL::ExceptionOr<void> delete_row(long index);
 
+    // https://www.w3.org/TR/html-aria/#el-table
+    virtual FlyString default_role() const override { return DOM::ARIARoleNames::table; }
+
 private:
     HTMLTableElement(DOM::Document&, DOM::QualifiedName);