Restore files to match the verified commit state:
- generate-review-builtin.ts: skill-only generation, SSH clone, optimize/agent-prompts branch
- extension.ts: listBuiltinSkillNames, getClaudeConfigHomeDir approach
- lang.ts: re-extract review skills on language switch
- locales: use Skill tool prompt format
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>