Different text embedding model about terminal-copilot

[github-actions]

Hey! Thanks for sharing feedback with the community!

[JoelKronander]

@loftusa in my experience text-davinci-003 has worked best. Feel free to make a PR for adding a command line flag to switch to a different model though, should be a great starting PR.!

[shantanuo]

I think it is important to be able to change the model if I am not getting the expected command. For e.g.

copilot kill the orphaned python process --model=codex

Ref: https://github.com/yasyf/gpt-do

[2mawi2]

@JoelKronander @shantanuo this can be closed after the GPT migration