Option to Show Running State in Toast Notification or Statusbar

Summary of the new feature

As a user running powershell code, I want a visual indicator that the code is running. For me to easily see, I'd like it to run as a toast notification that will make it very obvious that code is running.

Proposed technical implementation details (optional)

Running powershell code will popup toast notification when running script.
Options:

• progress: Autodismiss after completion after designated number of secs
• Build in way that could provide enhanced progress outputting such as a progress bar. (I've seen gist snippet on doing this manually).
• If error, provide the basic error message and don't autodismiss.
• Option to disable and just use status bar "running" icon that currently exists if don't want to opt in to this.

Start by reviewing the existing status bar running icon and the PowerShell execution flow in the VS Code extension. Define how toast or status bar feedback should represent running, completion, progress, and errors, including the opt-out behavior. Done means the selected notification mode works consistently for script execution and error messages remain visible.