Add -NoNewWindow to Start-Process in Show-Karma -Meditat

[vexx32]

PR Summary

Start-Process by default opens a new console. We generally do not want this to be the case for Show-Karma -Meditate.

Context

Fixes #395

Changes

• Add -NoNewWindow to Start-Process call in Show-Karma

Checklist

• Pull Request has a meaningful title.
• Summarised changes.
• Pull Request is ready to merge & is not WIP.
• Added tests / only testable interactively.
  • Make sure you add a new test if old tests do not effectively test the code changed.
• Added documentation / opened issue to track adding documentation at a later date.