LibWeb/IDB: Implement IDBCursorWithValue interface

Author: https://github.com/stelar7
Commit: 296d9d74d8
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4720
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/AtkinsSJ ✅
Reviewed-by: https://github.com/shannonbooth

Libraries/LibWeb/IndexedDB/IDBCursorWithValue.idl

@@ -0,0 +1,6 @@
+#import <IndexedDB/IDBCursor.idl>
+
+[Exposed=(Window,Worker)]
+interface IDBCursorWithValue : IDBCursor {
+    readonly attribute any value;
+};