Utility function to generate random greetings, etc. from JSON files.

There are utility function exports for three types of greetings: greetings, goodbyes, and oopsies.

To generate a random greeting, use randomGreeting. To generate a random goodbye, use randomGoodbye. To generate a random oopsie, use randomOopsie.

To pass in your own custom dictionary of strings, use the randomGreetingGenerator function and pass an array of strings.