Add cn doctor with mirror auto-failover and restore commands

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

bin/omarchy-cn-restore-list

@@ -0,0 +1,31 @@
+#!/bin/bash
+# omarchy:summary=List OmarchyCN configuration backups
+# omarchy:examples=omarchycn restore list
+
+set -euo pipefail
+
+source "$OMARCHY_PATH/cn/lib/dev-mirror.sh"
+
+echo "Dev-mirror backups ($CN_DM_BACKUP_ROOT):"
+if [[ -d $CN_DM_BACKUP_ROOT ]]; then
+  for dir in "$CN_DM_BACKUP_ROOT"/*/; do
+    [[ -d $dir ]] || continue
+    stamp="${dir%/}"
+    stamp="${stamp##*/}"
+    echo "  $stamp: $(ls "$dir" | tr '\n' ' ')"
+  done
+else
+  echo "  (none)"
+fi
+
+echo "Mirrorlist backups (/etc/pacman.d):"
+found="false"
+for f in /etc/pacman.d/mirrorlist.omarchycn-bak-*; do
+  if [[ -e $f ]]; then
+    echo "  ${f##*/}"
+    found="true"
+  fi
+done
+if [[ $found == "false" ]]; then
+  echo "  (none)"
+fi