title: how to access the text of vscode breadcrumb from extension
body: <p>I am trying to write an extension to copy the text / path shown in vscode breadcrumb (marked in blue in picture). But I am unable to find any vscode api to read that. Any help with that?</p>
  
  <p><img src="https://i.stack.imgur.com/b3MBp.png" alt="vscode breadcrumb"></p>