Stash/pop any local changes before pulling updates

More user customizations will survive without commits.

bin/omarchy-update

@@ -10,8 +10,10 @@ else
   last_updated_at=$(git log -1 --format=%cd --date=unix)
 fi
 
-# Get the latest
+# Get the latest while trying to preserve any modifications
+git stash
 git pull
+git stash pop
 
 # Run any pending migrations
 for file in migrations/*.sh; do