Update to latest openai and fix prompt cli arg

[vinnymac]

Summary

This change updates jscodemod to the latest openai library and makes all the necessary changes to support it. Also fixes prompt CLI issue that prevents the demo:* commands from working.

Some work may still be needed to do proper error handling, as it looks like that changed in v4 as well. But testing is needed.

[pjanik]

I've tried to clone your branch and run it locally, but running into issues:

"message": "Could not transform file "/abc.js". It is too large. To address this:\n \n1. Use the codemod's ignore API to ignore it.\n2. Or split the file into smaller pieces.\n3. Or use a model with a larger token limit.\n\nYou can read more about model limits at https://beta.openai.com/docs/models/overview. To see how many tokens your code is, see the tool at https://beta.openai.com/tokenizer. Your code must take up less than half the token limit of the model, because the token limit applies to both the input and the output, so we need to leave a headroom of 50% for the model to have room to respond.",

It doesn't matter how small or large is the file.