title: using regex inside keybindings.json
body: <p>I want to use regex inside of the text in args,</p>
  <pre><code>{
      &quot;key&quot;: &quot;ctrl+shift+r&quot;,
      &quot;command&quot;: &quot;workbench.action.terminal.sendSequence&quot;,
      &quot;args&quot;: { &quot;text&quot;:'${file}.'\u000D&quot;  } 
  }
  </code></pre>
  <p>I want to take the name of the file from the file path using this regex - <code>^\\(.+\\)*(.+)\.(.+)$</code>
  or taking the filename in other way,
  anyone can help?:)</p>