Drop western default apps from the CN default set

Basecamp, Discord, HEY, Google Contacts/Maps/Messages/Photos,
WhatsApp, and X lose their shipped launchers, webapp keybindings,
and the whatsapp-slim extension; aether, libreoffice-fresh, and
obs-studio leave the base package set. The HEY mailto handler and
its registration go with them. Preinstall add/remove lists, the
launcher hide list, and chromium flags stay in sync.

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

default/omarchy/launcher.hides

@@ -19,11 +19,6 @@ kbd-layout-viewer5
 kcm_fcitx5
 kcm_kaccounts
 kvantummanager
-libreoffice-base
-libreoffice-draw
-libreoffice-math
-libreoffice-startcenter
-libreoffice-xsltfilter
 limine-snapper-restore
 lstopo
 org.fcitx.Fcitx5