Introduce node.js support

[brianoliver]

As an application developer using Node and Java, I'd like the ability to launch node-based applications using Bedrock, just as I can do for Java-based applications.

For example:

NodeApplication app = platform.launch(NodeApplication.class, Node.path(pathToNode), Node.script(pathToScript), Argument.of("hello"), Argument.of("world"));

This would simplify launching and controlling Node-based applications, without having to launch them as scripts / command-line applications.