Support multi-level navbar

[MikeCZ23]

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

yes

Describe the solution you'd like

{
   "text":"level1",
   "collapsible":true,
   "collapsed":false,
   "items":[
      {
         "text":"level1-1",
         "collapsible":true,
         "collapsed":false,
         "items":[
            {
               "text":"level1-1-1 ",
               "link":"/01.1"
            },
            {
               "text":"level1-1-2 ",
               "link":"/01.2"
            }
         ]
      },
      {
         "text":"level1-2",
         "collapsible":true,
         "collapsed":false,
         "items":[
            {
               "text":"level1-2-1 ",
               "link":"/02.1"
            },
            {
               "text":"level1-2-2 ",
               "link":"/02.2"
            }
         ]
      }
   ]
}

Describe alternatives you've considered

No response

Additional context

No response

Validations

• [X] Follow our Code of Conduct
• [X] Read the docs.
• [X] Read the Contributing Guidelines.
• [X] Check that there isn't already an issue that asks for the same feature to avoid creating a duplicate.

[kiaking]

You mean you wanna have nested nav bar menu? Do you have any example how it might look like?

[MikeCZ23]

You mean you wanna have nested nav bar menu? Do you have any example how it might look like?

something like this

[kiaking]

Ah I see. Gotcha. Could be cool to have but maybe with a bit different design. Popping up different dialog on top of another dialog becomes tricky when we have many nested menu 👀

I think switching panel inside dialog would be more scalable. Maybe I'll whip up some design for this.