When using the CLI in non-immersive mode in PowerShell, provide completion for commands and their options.

Additional information:
https://twitter.com/lzybkr/status/954359342001614849
https://twitter.com/lzybkr/status/954363715213672449
https://github.com/lzybkr/TabExpansionPlusPlus/blob/master/WindowsExe.ArgumentCompleters.ps1
https://github.com/lzybkr/TabExpansionPlusPlus