docs: add missing Japanese translations to complete zh-CN parity (ja-JP)
Add remaining files to match zh-CN documentation structure:
- hooks/README.md — hooks architecture and customization guide
- examples/ — 8 project CLAUDE.md templates (general, user, django, go, harmonyos, laravel, rust, saas-nextjs)
- CHANGELOG.md — version history
- the-openclaw-guide.md — OpenClaw guide (471 lines)
Total: 11 files, 2362 insertions
ja-JP now has full parity with zh-CN directory structure.
Claude