feat: add Kiro support (#21)

* chore: change license to MIT

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

Co-Authored-By: Claude <noreply@anthropic.com>

* feat: add Kiro support

- Add .kiro/steering/ui-ux-pro-max.md with inclusion: manual frontmatter
- Add CLI support for --ai kiro option
- Update README and CLAUDE.md with Kiro docs
- Bump CLI version to 1.3.0

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

---------

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

cli/src/utils/extract.ts

@@ -39,7 +39,7 @@ export async function copyFolders(
   const copiedFolders: string[] = [];
 
   const foldersToCopy = aiType === 'all'
-    ? ['.claude', '.cursor', '.windsurf', '.agent', '.shared']
+    ? ['.claude', '.cursor', '.windsurf', '.agent', '.github', '.kiro', '.shared']
     : AI_FOLDERS[aiType];
 
   // Deduplicate folders (e.g., .shared might be listed multiple times)