/user command setting persistent to the project

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

I'd like to save /user command setting in GitHub Copilot CLI and it should be persistent to the repository

### Proposed solution

It will be beneficial for those users who use multiple GitHub Copilot licenses for different repositories, like licenses from multiple clients, educational licenses etc

### Example prompts or workflows

_No response_

### Additional context

_No response_