Some icons are not documented

[zillauser]

It's possible to add some icons to components (e.g. Button) even if they're not documented on the public page or in the code.

This is an example of the snippet I tested:

<Button
  iconStart="settings" // "play-triangle", "music"
  variant="ghost"
  uniform
 />

These are the results:

It would be helpful to have an overview of all available icons to easily create a more customized UI.