Is your feature request related to a problem? Please describe.
When running prettier --check as a task, it would be nice to have a problem matcher definitions so any unformatted files show as problems in VS Code's problems view.

Describe the solution you'd like
For the extension to contribute an appropriate problem matcher.

Describe alternatives you've considered
Implement one myself and copy paste it anywhere I need it.

Additional context
https://code.visualstudio.com/docs/editor/tasks#_defining-a-problem-matcher

Do note that the current output format of prettier --check might not be the most suitable for matching with a VS Code problem matcher.