Is your feature request related to a problem? Please describe.
I can't find a way of providing my own LLM key to use with the '--ai' for commits and PR creation
Describe the solution you'd like
Ideally we could config GK cli to use our own key and LLM provider
Describe alternatives you've considered
I had to switch to GK desktop, but my preference would be keep using in the GK cli
Additional context
This would allow people to keep using the tool even though the tokens available in the subscription were expired