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/limit-count/limit-count-redis-cluster.lua

@@ -0,0 +1,83 @@
+--
+-- 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 redis_cluster = require("apisix.utils.rediscluster")
+local core = require("apisix.core")
+local setmetatable = setmetatable
+local tostring = tostring
+
+local _M = {}
+
+
+local mt = {
+    __index = _M
+}
+
+
+local script = core.string.compress_script([=[
+    assert(tonumber(ARGV[3]) >= 1, "cost must be at least 1")
+    local ttl = redis.call('ttl', KEYS[1])
+    if ttl < 0 then
+        redis.call('set', KEYS[1], ARGV[1] - ARGV[3], 'EX', ARGV[2])
+        return {ARGV[1] - ARGV[3], ARGV[2]}
+    end
+    return {redis.call('incrby', KEYS[1], 0 - ARGV[3]), ttl}
+]=])
+
+
+function _M.new(plugin_name, limit, window, conf)
+    local red_cli, err = redis_cluster.new(conf, "plugin-limit-count-redis-cluster-slot-lock")
+    if not red_cli then
+        return nil, err
+    end
+
+    local self = {
+        limit = limit,
+        window = window,
+        conf = conf,
+        plugin_name = plugin_name,
+        red_cli = red_cli,
+    }
+
+    return setmetatable(self, mt)
+end
+
+
+function _M.incoming(self, key, cost)
+    local red = self.red_cli
+    local limit = self.limit
+    local window = self.window
+    key = self.plugin_name .. tostring(key)
+
+    local ttl = 0
+    local res, err = red:eval(script, 1, key, limit, window, cost or 1)
+
+    if err then
+        return nil, err, ttl
+    end
+
+    local remaining = res[1]
+    ttl = res[2]
+
+    if remaining < 0 then
+        return nil, "rejected", ttl
+    end
+    return 0, remaining, ttl
+end
+
+
+return _M