feat(cli): more Nushell support #544

Job	Run time
Test install.ps1 (Windows ARM64)	57s
Test install.sh (Linux ARM64 musl via QEMU)	1m 24s
Test install.sh (Linux x64 glibc)	16s
Test vp-setup.exe (pwsh)	4m 43s
Test install.ps1 (Windows x64, PowerShell 7.6)	1m 9s
Test install.ps1 (Windows x64)	52s
Test install.sh (Linux ARM64 glibc via QEMU)	2m 36s
Test install.ps1 (minimum-release-age)	24s
Test install.sh (macOS x64)	30s
Test install.sh (readonly shell config)	10s
Test install.sh (macOS ARM64)	21s
Test install.sh (Linux x64 musl)	25s
Test install.ps1 (Windows x64, PowerShell 5.1)	37s
	14m 24s

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