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/en/latest/architecture-design/apisix.md

@@ -0,0 +1,51 @@
+---
+title: Architecture
+keywords:
+  - API Gateway
+  - Apache APISIX
+  - APISIX architecture
+description: Architecture of Apache APISIX—the Cloud Native API Gateway.
+---
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+
+APISIX is built on top of Nginx and [ngx_lua](https://github.com/openresty/lua-nginx-module) leveraging the power offered by LuaJIT. See [Why Apache APISIX chose Nginx and Lua to build API Gateway?](https://apisix.apache.org/blog/2021/08/25/why-apache-apisix-chose-nginx-and-lua/).
+
+![flow-software-architecture](https://raw.githubusercontent.com/apache/apisix/master/docs/assets/images/flow-software-architecture.png)
+
+APISIX has two main parts:
+
+1. APISIX core, Lua plugin, multi-language Plugin runtime, and the WASM plugin runtime.
+2. Built-in Plugins that adds features for observability, security, traffic control, etc.
+
+The APISIX core handles the important functions like matching Routes, load balancing, service discovery, configuration management, and provides a management API. It also includes APISIX Plugin runtime supporting Lua and multilingual Plugins (Go, Java , Python, JavaScript, etc) including the experimental WASM Plugin runtime.
+
+APISIX also has a set of [built-in Plugins](https://apisix.apache.org/docs/apisix/plugins/batch-requests) that adds features like authentication, security, observability, etc. They are written in Lua.
+
+## Request handling process
+
+The diagram below shows how APISIX handles an incoming request and applies corresponding Plugins:
+
+![flow-load-plugin](https://raw.githubusercontent.com/apache/apisix/master/docs/assets/images/flow-load-plugin.png)
+
+## Plugin hierarchy
+
+The chart below shows the order in which different types of Plugin are applied to a request:
+
+![flow-plugin-internal](https://raw.githubusercontent.com/apache/apisix/master/docs/assets/images/flow-plugin-internal.png)