- Rewrite install/uninstall to use delta-tracking (added/replaced/removed)
- Install records only what the plugin changed:
* added: plugin新增的配置(卸载时删除)
* replaced: plugin覆盖的旧配置(卸载时恢复)
- Uninstall only affects plugin-managed keys, preserving user changes elsewhere
- Remove install-dirigent-openclaw.sh to avoid confusion