feat(apisix): add Cloudron package

- Implements Apache APISIX packaging for Cloudron platform.
- Includes Dockerfile, CloudronManifest.json, and start.sh.
- Configured to use Cloudron's etcd addon.

🤖 Generated with Gemini CLI
Co-Authored-By: Gemini <noreply@google.com>

CloudronPackages/APISIX/apisix-source/utils/check-lua-code-style.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+set -ex
+
+luacheck -q apisix t/lib
+
+find apisix -name '*.lua' ! -wholename 'apisix/cli/ngx_tpl.lua' ! -wholename 'apisix/cli/config.lua' -exec ./utils/lj-releng {} + > \
+    /tmp/check.log 2>&1 || (cat /tmp/check.log && exit 1)
+
+grep -E "ERROR.*.lua:" /tmp/check.log > /tmp/error.log || true
+if [ -s /tmp/error.log ]; then
+    echo "=====bad style====="
+    cat /tmp/check.log
+    exit 1
+fi