Lets PRG use the npm ecosystem with NO C/CGO/Harbour native — faithful to
Five (C→Go). NODE_EVAL(cJs[,cWorkdir[,cInput]]) shells out to `node -e`
(pure os/exec), resolving node from PATH or common Homebrew/usr paths;
user data passes via env FIVE_NODE_INPUT (no code injection); returns
{ok,out,err} JSON. The Go binary stays pure Go and only spawns node when
this RTL is used.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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