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

bin/omarchy-remove-preinstalls

@@ -18,13 +18,10 @@ if gum confirm "Are you sure you want to remove all preinstalled web apps, TUI w
        ~/.local/bin/omp ~/.local/bin/ori ~/.local/bin/grok ~/.local/bin/crush ~/.local/bin/ghui ~/.local/bin/hunk
 
   omarchy-pkg-drop \
-    aether \
     cliamp \
-    libreoffice-fresh \
     xournalpp \
     pinta \
     obsidian \
-    obs-studio \
     kdenlive \
     moonlight-qt \
     lazydocker \