feat: add one-click dist release script

scripts/release_dist.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
+DIST_DIR="${DIST_DIR:-${REPO_ROOT}/dist}"
+RELEASE_REPO_URL="${RELEASE_REPO_URL:-https://git.halonice.com/yuanzhen869/shunt-rules-release.git}"
+TARGET_BRANCH="${TARGET_BRANCH:-main}"
+COMMIT_MESSAGE="${COMMIT_MESSAGE:-chore: release dist}"
+
+if [[ ! -d "${DIST_DIR}" ]]; then
+  echo "dist directory not found: ${DIST_DIR}" >&2
+  exit 1
+fi
+
+tmp_dir="$(mktemp -d)"
+cleanup() {
+  rm -rf "${tmp_dir}"
+}
+trap cleanup EXIT
+
+work_dir="${tmp_dir}/release"
+git clone --branch "${TARGET_BRANCH}" --single-branch "${RELEASE_REPO_URL}" "${work_dir}" >/dev/null
+
+find "${work_dir}" -mindepth 1 -maxdepth 1 ! -name '.git' -exec rm -rf {} +
+rsync -a "${DIST_DIR}/" "${work_dir}/"
+
+cd "${work_dir}"
+git add -A
+if git diff --cached --quiet; then
+  echo "no changes in dist, skip release"
+  exit 0
+fi
+
+git -c user.name="shunt-rules-bot" -c user.email="shunt-rules-bot@local" commit -m "${COMMIT_MESSAGE}" >/dev/null
+git push origin "${TARGET_BRANCH}"
+echo "release pushed to ${RELEASE_REPO_URL} (${TARGET_BRANCH})"