Simplified Chinese as a system language (locale, UI, CJK fonts) plus stock Pinyin

[eachann1024]

Omarchy already ships fcitx5 and the keyboard manual tells people to omarchy pkg add fcitx5-chinese-addons after install. That is only the IME. A Chinese user still gets an English system: English menus, English shell UI, tofu for CJK, and no zh_CN.UTF-8 unless they assemble it themselves.

This is a request for Simplified Chinese as a first-class system language, plus the matching IME. Not a wrapper patch, and not IME-only.

Ask

Add an official install/setup choice for 简体中文 that does all of the following:

1. System locale zh_CN.UTF-8 (not English-plus-a-package).
2. Omarchy shell / menu / bar / dialogs in Simplified Chinese. #7284 is the i18n mechanism; this request is for a real zh_CN translation on top of it.
3. CJK fonts in the base set (noto-fonts-cjk) so the desktop is not tofu on first boot.
4. Stock Pinyin: fcitx5-chinese-addons seeded for new accounts, with keyboard-us still available as a layout.

English can stay the default for everyone else. Users who pick 简体中文 at install (or in Setup) should get a Chinese system, not an English system they can type Chinese into.

Why

#1525 is people DIY-ing the IME. The missing piece is the OS language. Happy to help test a zh_CN path if this is in scope.