chore: track Linux deploy scripts with forced git pull

Ship start/restart/pull-and-restart and deploy lib so production can one-line update; git_pull_hard uses checkout -f, restart --pull aligns then restarts.

stop.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+# AI 建站 — 停止 Docker 栈
+# 用法：./stop.sh
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")" && pwd)"
+cd "$ROOT"
+# shellcheck disable=SC1091
+. "$ROOT/scripts/lib-aijz-deploy.sh"
+
+echo "停止 AI 建站 ($ROOT) ..."
+ensure_docker
+stack_down
+echo "已停止."