https://github.com/github/gh-copilot
    gh auth login --web
        The value of the GH_TOKEN environment variable is being used for authentication.
        To have GitHub CLI store credentials instead, first clear the value from the environment.
    gh auth login --web -h github.com
https://docs.github.com/en/copilot/using-github-copilot/using-github-copilot-in-the-command-line
    gh extension search gh-copilot
    gh extension install github/gh-copilot
    gh extension upgrade gh-copilot
https://docs.github.com/en/copilot/managing-copilot/configure-personal-settings/configuring-github-copilot-in-the-cli#setting-up-aliases
    gh copilot alias
    gh copilot alias -- zsh
    echo 'eval "$(gh copilot alias -- zsh)"' >> ~/.zshrc

ghcs
    suggest
ghce