Fixes #249

What broke

install.ps1 failed on Windows PowerShell 5.1 with a SyntaxError mid-script:

[eval]:17
      command: 'node '
SyntaxError: Unexpected end of input

Hook files were copied but settings.json was never updated, leaving caveman non-functional.

Root cause

node -e $nodeScript on Windows passes the multiline string through the Windows command processor, which terminates the argument at the first " character. The JS string contains 'node "' + hooksDir + ... — the " after node ends the argument early.

Fix

Write the script to a temp .js file and run node tempfile.js. Temp file is cleaned up in a finally block regardless of success or failure.

$tmpScript = Join-Path $env:TEMP "caveman-install-$([System.Diagnostics.Process]::GetCurrentProcess().Id).js"
try {
    [System.IO.File]::WriteAllText($tmpScript, $nodeScript, [System.Text.Encoding]::UTF8)
    node $tmpScript
} finally {
    if (Test-Path $tmpScript) { Remove-Item $tmpScript -Force }
}

Verified clean install output on Windows 11 / PowerShell 5.1 / Node v24.14.0.