Add import function

[kaidesu]

Ghost already supports importing modules using the following syntax:

import { Example } from 'example'

Adding an import function variant would allow developers to dynamically load in and assign values during runtime. For example, it would be possible to scan and auto-import a directory of ghost files:

files = scanDirectory('config')

for (file in files) {
  const config = import(file)

  // do something with "config"
}

This would re-use the existing import keyword but would be invoked as a function.