Package JS file directly in this package

[wpscholar]

Right now, the JavaScript file that loads the runtime is actually a separate NPM package. This is unnecessary and actually makes development more cumbersome.

The JavaScript in this package is split into two parts:

• The NewfoldRuntime object that contains any registered properties.
• The NewfoldRuntime JavaScript module which lives as a separate NPM package and can be loaded in other packages to provide access to functions.

We should:

• Create a fn namespace on the main NewfoldRuntime object that gets set on the window. This way, other packages can just reference the required functions by calling window.NewfoldRuntime.fn.<functionName>.
• Have the Composer package load the JavaScript file directly and do away with the NPM package.