text: Title: Support a collapsed page navigation menu that only shows the page icons
  Body: ### Checklist
  
  - [x] I have searched the [existing issues](https://github.com/streamlit/streamlit/issues) for similar feature requests.
  - [x] I added a descriptive title and summary to this issue.
  
  ### Summary
  
  Support a collapsed page navigation menu that only shows the page icons similar to the VS Code activity bar:
  ![Image](https://github.com/user-attachments/assets/67ee04f3-2c02-4727-a36a-6d6caa587031)
  
  ### Why?
  
  _No response_
  
  ### How?
  
  _No response_
  
  ### Additional Context
  
  _No response_