Navdrawer disabled items

[didimmova]

Is your feature request related to a problem? Please describe.

Currently, the navigation drawer in Angular doesn't have the option or the styles to make an item of the navdrawer disabled. P.S: In Web Components the state is present but we need to implement the design of the disabled state there also.

Describe the solution you'd like

I want to have the disabled option available on the items and to have a design provided for this state in all themes.