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/ext-plugin/helper.lua

@@ -0,0 +1,81 @@
+--
+-- 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 is_http = ngx.config.subsystem == "http"
+local core = require("apisix.core")
+local config_local = require("apisix.core.config_local")
+local process
+if is_http then
+    process = require "ngx.process"
+end
+local pl_path = require("pl.path")
+
+
+local _M = {}
+
+
+do
+    local path
+    function _M.get_path()
+        if not path then
+            local local_conf = config_local.local_conf()
+            if local_conf then
+                local test_path =
+                    core.table.try_read_attr(local_conf, "ext-plugin", "path_for_test")
+                if test_path then
+                    path = "unix:" .. test_path
+                end
+            end
+
+            if not path then
+                local sock = "./conf/apisix-" .. process.get_master_pid() .. ".sock"
+                path = "unix:" .. pl_path.abspath(sock)
+            end
+        end
+
+        return path
+    end
+end
+
+
+function _M.get_conf_token_cache_time()
+    return 3600
+end
+
+
+function _M.response_reader(reader, callback, ...)
+    if not reader then
+        return "get response reader failed"
+    end
+
+    repeat
+        local chunk, read_err, cb_err
+        chunk, read_err = reader()
+        if read_err then
+            return "read response failed: ".. (read_err or "")
+        end
+
+        if chunk then
+            cb_err = callback(chunk, ...)
+            if cb_err then
+                return cb_err
+            end
+        end
+    until not chunk
+end
+
+
+return _M