LibWeb: Implement the translate attribute

Author: https://github.com/Calme1709
Commit: 279913a223
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4855
Reviewed-by: https://github.com/gmta ✅

Libraries/LibWeb/HTML/HTMLElement.h

@@ -82,6 +82,9 @@ public:
 
     Optional<String> title() const { return attribute(HTML::AttributeNames::title); }
 
+    bool translate() const;
+    void set_translate(bool);
+
     StringView dir() const;
     void set_dir(String const&);