Suggestion: Include 'Run in External PowerShell Window' by default in debug options

Hi, all,

Firstly, I love this PowerShell in vscode, thank you for this!
Secondly, I loved PowerGUI while it worked.

Mostly because a lot of the scripting work that I do is very one and done, and I don't need to do a lot of debugging, but the scripts I write are far too long to do freely in a powershell window.

As a result, I LOVED the 'Run in External PowerShell Window' option that PowerGUI supported.

I have found that I can get this functionality back by adding the following Launch Option into my Launch.json file, however, it took far longer than I care to admit to get it working as I wasn't sure about how the launch settings actually worked:

    {
        "type": "PowerShell",
        "request": "launch",
        "name": "Run in External PowerShell Window",
        "script": "Start-Process",
        "args": ["PowerShell.exe -Argumentlist '-NoExit -Executionpolicy Bypass -File ${File}'"],
        "cwd": "${File}"
    },

Can this please be added as a default Launch option for others who miss this functionality! :)

Start by tracing how vscode-powershell contributes default PowerShell launch configurations and compare that behavior with the launch.json snippet in the report. Add the external-window configuration to the defaults, then verify that a new debug configuration exposes it and launches the current file in an external PowerShell window.