Vim-like :q alias for exiting

### Describe the feature or problem you'd like to solve

Old habits die hard and several cli tools have support for :q to exit. Copilot doesn't. It recently added an exit alias (non-slashed) to avoid submitting prompts when wanting to exit copilot. Can we have ":q" as an exit alias on top of (/exit, /quit and exit)

### Proposed solution

Increase UX of Copilot Cli by adding a vim-like ":q" alias for exiting. Similar behavior as the "exit" alias, with the purpose of avoiding submitting prompt requests to Copilot when the user wanted to exit instead

### Example prompts or workflows

_No response_

### Additional context

_No response_