Add additional classes on Menu

[burhandodhy]

trafficstars

Is your enhancement related to a problem? Please describe.

At the moment, the menu item only has one class related to its depth. It would be beneficial to include additional classes such as menu-item-type-custom and menu-item-has-children.

Designs

No response

Describe alternatives you've considered

No response

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[nicholasio]

We haven't actually used this component in production, but happy to add improvements to it. Wanna submit a PR?