Add wrapper binary to .gitignore (#14)

## Summary
- Add `codex/wrapper/wrapper` (compiled Go binary, ~3MB) to `.gitignore`
to prevent accidental commits

## Test plan
- [ ] Verify `git status` no longer shows `codex/wrapper/wrapper` as
untracked

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

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: juhgiyo

.gitignore

@@ -5,6 +5,7 @@
 *.so
 *.dylib
 codex/strawpot_codex
+codex/wrapper/wrapper
 
 # Test binary
 *.test