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/ci/free_disk_space.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+#
+# 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.
+#
+
+# GitHub Action CI runner comes with a limited disk space, due to several reasons
+# it may become full. For example, caching docker images creates an archive of
+# several GBs of size, this sometimes leads to disk usage becoming full.
+# To keep CI functional, we delete large directories that we do not need.
+
+echo "=============================================================================="
+echo "Freeing up disk space on CI system"
+echo "=============================================================================="
+
+echo "Initial disk usage:"
+df -h
+
+echo "Removing large directories and runtimes..."
+sudo rm -rf /usr/local/lib/android /usr/share/dotnet /opt/ghc /usr/local/.ghcup /usr/share/swift
+
+echo "Removing large packages and performing clean-up..."
+sudo apt-get remove -y '^aspnetcore-.*' '^dotnet-.*' '^llvm-.*' 'php.*' '^mongodb-.*' '^mysql-.*' \
+azure-cli google-chrome-stable firefox powershell mono-devel libgl1-mesa-dri google-cloud-sdk google-cloud-cli --fix-missing
+sudo apt-get autoremove -y
+sudo apt-get clean
+
+echo "Removing Docker images..."
+sudo docker image prune --all --force
+
+echo "Removing and Swap storage..."
+sudo swapoff -a
+sudo rm -f /mnt/swapfile
+
+echo "Final disk usage:"
+df -h