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/apisix/plugins/openfunction.lua

@@ -0,0 +1,35 @@
+--
+-- 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.
+--
+local ngx_encode_base64 = ngx.encode_base64
+local plugin_name, plugin_version, priority = "openfunction", 0.1, -1902
+
+local openfunction_authz_schema = {
+    service_token = {type = "string"}
+}
+
+local function request_processor(conf, ctx, params)
+    local headers = params.headers or {}
+    -- setting authorization headers if authorization.service_token exists
+    if  conf.authorization and conf.authorization.service_token then
+        headers["authorization"] = "Basic " .. ngx_encode_base64(conf.authorization.service_token)
+    end
+
+    params.headers = headers
+end
+
+return require("apisix.plugins.serverless.generic-upstream")(plugin_name,
+        plugin_version, priority, request_processor, openfunction_authz_schema)