GitHub Copilot CLI Not Accessible with VoiceOver on macOS

# GitHub Copilot CLI Not Accessible with VoiceOver on macOS

## Summary
GitHub Copilot CLI output is not readable by VoiceOver on macOS Terminal, making it completely inaccessible for blind users.

## Steps to Reproduce
1. Enable VoiceOver on macOS
2. Run any GitHub Copilot CLI command in Terminal
3. VoiceOver does not announce the output
4. User must copy output to TextEdit to read it

## Expected Behavior
VoiceOver should read CLI output as it appears, like with standard terminal commands.

## Actual Behavior
Output appears visually but VoiceOver does not announce it. No audio feedback provided.

## Impact
- Makes Copilot CLI completely unusable for blind users
- Violates accessibility requirements (ADA, Section 508)
- Excludes disabled developers from using the tool

## Environment
- macOS with VoiceOver enabled
- Terminal.app
- GitHub Copilot CLI

## Priority
Critical - accessibility blocker

## Suggested Fixes
- Ensure output goes to stdout properly
- Test with VoiceOver enabled
- Add ARIA-live region support if applicable
- Consider text-to-speech integration option