node-gnuplot wrapper

node-gnuplot is a lightweight wrapper for the `gnuplot` command-line utility, designed for Node.js environments. Currently at version 0.3.1, this package provides a direct and programmatic interface to interact with the external `gnuplot` plotting engine. It allows developers to send `gnuplot` commands, such as `set`, `plot`, and `splot`, via a fluent, chainable API or by piping data streams directly. The library spawns a `gnuplot` child process and manages its stdin/stdout, making it suitable for generating image files (e.g., PNG, SVG) from mathematical functions or data streams. Its release cadence is slow, and the package appears to be in an abandoned state given its low version number and lack of recent activity. A key differentiator is its minimal abstraction over `gnuplot`, providing direct access to its capabilities rather than implementing its own charting logic. Users must have `gnuplot` installed on their system for this package to function.