Update the CKEditor experience

This is a major refactor of what was in the openai_ckeditor module before.

When you receive this change, you need to run database updates in Drupal. There is an update hook that will swap the old plugin out for the new plugin. In your text formats, there is a new section for setting OpenAI settings (model, temperature, etc) for the initial plugins.

Here is a preview of what it will be like:

in action (sorry its a gif):

We can work at the UI as we go (the native popups could use some work). I have other ideas as well for iterating on this.