Describe the bug
Stagehand is deprecated. The new thing is dart pub create

To Reproduce
Steps to reproduce the behavior:

1. uninstall the broken stagehand (broken now because pub no longer exists):
   dart pub global deactivate stagehand # buh bye broken tool
2. command-window Dart: create project
3. Fails, wanting the now-broken stagehand to be reinstalled. No way, jose.

Expected behavior
dart pub create gets run with the proper args

Screenshots

Versions (please complete the following information):

• VS Code version: 1.54.1
• Dart extension version: 3.20.1
• Dart/Flutter SDK version: 2.0+dev