Add Drush AI Command

Here's the initial Merge Request that includes the basic drush ai:chat command that sends the request to the LLM. Would love some ideas on how it could improve.

I think it would be really cool to expose some function calling to allow the AI to run Drush commands for you. Then you could do stuff like...

drush ai "Create a log in link for Jeff, and then clear the cache"

Whoa this is cool

Tested this and yup it works.
- without parameters
- with model and provider params

If you add only the provider param (different from your standard) it throws an error (for me).
But it also is an edge case I think. If you're adding a providder it also makes sense to add a model.

I also see you're catching some errors in the code. I like it

Awesome stuff - I fixed some phpcs issues and have merged. Thanks Rob!

Automatically closed - issue fixed for 2 weeks with no activity.