Ship Chinese IME and font fallback by default on zh_CN systems

fcitx5-rime, fcitx5-chinese-addons, and fcitx5-configtool join the
base package set, and a provisioning step seeds the Rime profile and
CJK fontconfig for users on systems whose locale is zh_CN, so Chinese
input works at first boot without omarchycn setup.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QKxGW1raAWaqeU8WdHsMsp

install/omarchy-base.packages

@@ -34,8 +34,11 @@ eza
 fakeroot
 fastfetch
 fcitx5
+fcitx5-chinese-addons
+fcitx5-configtool
 fcitx5-gtk
 fcitx5-qt
+fcitx5-rime
 fd
 ffmpegthumbnailer
 fontconfig