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/docs/zh/latest/apisix-variable.md

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+---
+title: APISIX 变量
+keywords:
+ - Apache APISIX
+ - API 网关
+ - APISIX variable
+description: 本文介绍了 Apache APISIX 支持的变量。
+---
+
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+
+## 描述
+
+APISIX 除了支持 [NGINX 变量](http://nginx.org/en/docs/varindex.html)外，自身也提供了一些变量。
+
+## 变量列表
+
+|    变量名称         |  来源       | 描述                                                                             | 示例              |
+|---------------------|----------- |--------------------------------------------------------------------------------- | ---------------- |
+| balancer_ip         | core       | 上游服务器的 IP 地址。                                                            | 192.168.1.2      |
+| balancer_port       | core       | 上游服务器的端口。                                                                | 80               |
+| consumer_name       | core       | 消费者的名称。                                                                    |                  |
+| consumer_group_id   | core       | 消费者所在的组的 ID。                                                            |                  |
+| graphql_name        | core       | GraphQL 的 [operation name](https://graphql.org/learn/queries/#operation-name)。 | HeroComparison   |
+| graphql_operation   | core       | GraphQL 的操作类型。                                                              | mutation         |
+| graphql_root_fields | core       | GraphQL 最高级别的字段。                                                          | ["hero"]          |
+| mqtt_client_id      | mqtt-proxy | MQTT 协议中的客户端 ID。                                                          |                   |
+| route_id            | core       | APISIX 路由的 ID。                                                                |                   |
+| route_name          | core       | APISIX 路由的名称。                                                               |                   |
+| service_id          | core       | APISIX 服务的 ID。                                                                |                   |
+| service_name        | core       | APISIX 服务的名称。                                                               |                   |
+| redis_cmd_line      | Redis      | Redis 命令的内容。                                                                |                   |
+| resp_body           | core       | 在 logger 插件中，如果部分插件支持记录响应的 body 信息，比如配置 `include_resp_body: true`，那可以在 log format 中使用该变量。|                   |
+| rpc_time            | xRPC       | 在 RPC 请求级别所花费的时间。                                                      |                   |
+
+当然，除上述变量外，你也可以创建自定义[变量](./plugin-develop.md#register-custom-variable)。