feat: add usePwsh helper for PowerShell v7+

[ShGKme]

Fixes #785

• Tests pass
• Appropriate changes to README are included in PR
• Types updated

Notes

No documentation was added. I haven't found any documentation for other helpers apart from release notes...

A smoke test was added to win32 test but I'm not sure if it's a good idea.

• pwsh is not available by default
• pwsh can be used on any supported platform

So the last commit can be dropped. Or I can create a new smoke test.

Description

A new helper usePwsh to use pwsh shell (PowerShell v7+).

import { usePowerShell, usePwsh } from 'zx'

usePowerShell() // to enable powershell.exe (PowerShell v5 on Windows)
usePwsh()       // switch to pwsh (PowerShell v7 on any supported platform)

Usage

Tested on Windows 11 and Fedora 38

usePwsh() console.log((await $`echo 'Foo' && echo 'Bar'`).stdout)	Foo Bar
usePowerShell() console.log((await $`echo 'Foo' && echo 'Bar'`).stdout)	At line:1 char:12 + echo 'Foo' && echo 'Bar'; exit $LastExitCode + ~~ The token '&&' is not a valid statement separator in this version. + CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException + FullyQualifiedErrorId : InvalidEndOfLine

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[ShGKme]

Fixed smoke test to use which from build/vendors, made Test / smoke-win32-node16 (pull_request) green 🟢

Added useBash and removed unneeded import from unit tests (having import with globals).

Fixed formatting.

[antongolub]

lgtm

[antongolub]

@ShGKme, thanks for the improvement.

Could you also verify the snapshot [email protected]?

[ShGKme]

Could you also verify the snapshot [email protected]?

✅ Verified

• Tested in build: use pwsh for release:package on Windows nextcloud/talk-desktop#642, works fine on Windows.
• Tested on Fedora 38