Address review feedback: versioned Homebrew formulas (node@22, node@20)
use keg-only paths where the stable symlink is at <prefix>/opt/<formula>/bin/node,
not <prefix>/bin/node. Updated resolveStableNodePath to:
1. Try <prefix>/opt/<formula>/bin/node first (works for both default + versioned)
2. Fall back to <prefix>/bin/node for the default "node" formula
3. Return the original Cellar path if neither stable path exists
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>