📝 docs: update README and config example for Claude Code support

- Rename SKILLS section heading to include Claude Code
- Update agents_home comment to mention ~/.claude for Claude Code

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

playbook.toml.example

@@ -40,7 +40,7 @@
 [install_skills]
 # mode = "list"                 # list|all
 # skills = ["brainstorming"]    # mode=list 时必填
-# agents_home = "~/.agents"     # 可选：默认 ~/.agents
+# agents_home = "~/.agents"     # Codex CLI；Claude Code 用 "~/.claude"；默认 ~/.agents
 # no_backup = false             # 可选：跳过备份，直接删除旧 skill 后重装
 
 [format_md]