chore: add specs/ to gitignore

- Add specs/ directory to gitignore to prevent tracking spec documents
- Spec documents are development reference only, not for production

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

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

Author: Clickin

.gitignore

@@ -6,6 +6,7 @@ CLAUDE.md
 .claude/
 .specify/
 spec/
+specs/
 
 # pnpm
 pnpm-lock.yaml