chore: remove reference folders (CLI generates these) (#130)

Remove folders that were only used as reference/examples:
- .cursor/, .windsurf/, .kiro/, .roo/, .github/
- .agent/, .opencode/

These folders are no longer needed since CLI generates
all necessary files for users via `uipro init`.

Update CLAUDE.md architecture section accordingly.

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

cli/src/utils/detect.ts

@@ -71,7 +71,7 @@ export function getAITypeDescription(aiType: AIType): string {
     case 'cursor':
       return 'Cursor (.cursor/commands/ + .shared/)';
     case 'windsurf':
-      return 'Windsurf (.windsurf/workflows/ + .shared/)';
+      return 'Windsurf (.windsurf/skills/ + .shared/)';
     case 'antigravity':
       return 'Antigravity (.agent/skills/)';
     case 'copilot':