Run cn migrations in the update pipeline and serve package installs from omarchy cn update

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Kb7vDj6PHwymeDeSUUk1eX

bin/omarchy-cn-migrate

@@ -0,0 +1,21 @@
+#!/bin/bash
+# omarchy:summary=Run pending OmarchyCN migrations
+# omarchy:examples=omarchycn migrate
+
+set -euo pipefail
+
+MIGRATIONS_DIR="$OMARCHY_PATH/cn/migrations"
+DONE_DIR="$HOME/.local/state/omarchycn/migrations-done"
+
+[[ -d $MIGRATIONS_DIR ]] || exit 0
+
+mkdir -p "$DONE_DIR"
+for m in "$MIGRATIONS_DIR"/*.sh; do
+  [[ -f $m ]] || continue
+  name="${m##*/}"
+  if [[ ! -f $DONE_DIR/$name ]]; then
+    echo "OmarchyCN migration: $name"
+    bash -euo pipefail "$m"
+    touch "$DONE_DIR/$name"
+  fi
+done