Feature request: add usePwsh helper for PowerShell 7+

[ShGKme]

There is a new usePowerShell helper for Windows PowerShell v5 in zx.
But Microsoft is no longer updating Windows PowerShell with new features since 2016 (source).

Now there is new PowerShell v7: cross-platform, open-source.
See also: Differences between Windows PowerShell 5.1 and PowerShell 7.x / PowerShell executable changes.

The only difference with usePowerShell is that it should use pwsh as executable instead of powershell.exe.

What about adding usePwsh helper similar to usePowerShell? If it's fine, I have a PR ready.

[antongolub]

Seems reasonable. But do we need a separate method? We can check pwsh bin first and if not found then fallback to powershell.exe.

[ShGKme]

But do we need a separate method? We can check pwsh bin first and if not found then fallback to powershell.exe.

Though there is a backwards compatibility mode, pwsh is not fully compatible with powershell.exe. Actually, that is also the reason why Microsoft renamed it to pwsh to have a simple deterministic way to run a specific version.

So I'm not sure it would be expected for users to run pwsh as powershell even it is available.

[antongolub]

@ShGKme,

Are you ready to create a PR?