feat: Add script hooks that use configured interpreters

[twpayne]

Fixes #4151.

Draft PR, not quite ready yet.

[bradenhilton]

Would adding a new script option (with the configured interpreters) for hooks be better?

I agree that it isn't ideal, but the current implementation is correct because it's a command option. I wouldn't expect, for example, executing .\script.ps1 in CMD to work properly. It just so happens that this works well on UNIX-like platforms because of shebangs.

script and command would be mutually exclusive and both would allow args.

[twpayne]

Would adding a new script option (with the configured interpreters) for hooks be better?

Yes, this is a great idea and would be much better, thank you! I'll definitely implement this instead.

[bradenhilton]

Just did a quick test with all permutations of this

# .chezmoiscripts/windows/.greet.ps1

if ($args.Count -eq 0) {
    Write-Output 'Hello'
} elseif ($args.Count -eq 1) {
    Write-Output "Hello $($args[0])"
} else {
    Write-Output "Hello $($args[0..($args.Count - 2)] -join ', ') and $($args[-1])"
}

and it worked as expected.

[twpayne]

Yay! Thanks for the review and testing :)