LibWeb: Implement BarProp properties for Window

Author: https://github.com/Totto16
Commit: b66e7ac1ba
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3810
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/tcl3 ✅

Libraries/LibWeb/HTML/Window.idl

@@ -34,6 +34,13 @@ interface Window : EventTarget {
     undefined focus();
     undefined blur();
 
+    [Replaceable] readonly attribute BarProp locationbar;
+    [Replaceable] readonly attribute BarProp menubar;
+    [Replaceable] readonly attribute BarProp personalbar;
+    [Replaceable] readonly attribute BarProp scrollbars;
+    [Replaceable] readonly attribute BarProp statusbar;
+    [Replaceable] readonly attribute BarProp toolbar;
+
     // other browsing contexts
     [Replaceable] readonly attribute WindowProxy frames;
     [Replaceable] readonly attribute unsigned long length;