feat: add GitHub Copilot support (#17)

- Add .github/prompts/ui-ux-pro-max.prompt.md for Copilot
- Add 'copilot' as new AI type in CLI
- Update detect utility to recognize .github folder
- Update CLAUDE.md sync rules with .github
- Update README with Copilot installation and usage
- Bump version to 1.2.0

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

cli/src/index.ts

@@ -12,7 +12,7 @@ const program = new Command();
 program
   .name('uipro')
   .description('CLI to install UI/UX Pro Max skill for AI coding assistants')
-  .version('1.1.1');
+  .version('1.2.0');
 
 program
   .command('init')