/setup

Install and configure the gh-issue-ext extension for advanced GitHub issue management

# GitHub Issues Setup

Install and configure the `gh-issue-ext` extension for advanced GitHub issue management.

## Steps to Perform

1. **Check if gh CLI is installed**
   
   If not installed, inform the user they need to install GitHub CLI first from https://cli.github.com/

2. **Check if gh is authenticated**
   
   If not authenticated, inform the user to run `gh auth login` first.

3. **Check if gh-issue-ext is already installed**
   

4. **Install or upgrade gh-issue-ext**
   If not installed:
   

   If already installed, ask if user wants to upgrade:
   

5. **Verify installation**...