Support nested Namespaces

[hjamaleddine]

Description

i use namespaces to draw packages and it is imposible to add subpackages, i mean sub namesapce.
second, i want to create a namespace with label like the class and also it is impossible
third, it is also imposible to add an annotation to a namespace

Steps to reproduce

try to define a namespace inside an other and use a try to annotate a namesapce like a class

Screenshots

No response

Code Sample

classDiagram
namespace BaseShapes <<enumeration>>{

    class Triangle
    class Rectangle {
      double width
      double height
    }
}

classDiagram
namespace [namespace's label] {

    class Triangle
    namespace SubNamespace {
      <<annotation>>
      class Rectangle {
        double width
        double height
      }
    }
}

Setup

• Mermaid version: 11.4.0
• Browser and Version: [Chrome, Edge, Firefox]

Suggested Solutions

No response

Additional Context

No response

[D0kRay]

There is a workaround for the nesting of namespaces.
But it doesn't work in 11.4

classDiagram
  
  namespace presentation{
      class auth
      class main
  }
  namespace auth{
      class AuthScreen
      class AuthViewModel
  }
  namespace main{
      class MainScreen
      class MainViewModel
  }

[dtcaobao]

Can confirm, I'm having the same issue here.
Using the PyCharm Mermaid plugin, 0.0.22+IJ.232 using Mermaid v10.9.1, I am able to make use of nested Namespaces.
It doesn't display any errors and the live editor isn't able to render it nor the Wiki in Azure DevOps.