feat: add APISIX Cloudron package (API-Gateway)

- Create Dockerfile wrapping official Apache APISIX image
- Add CloudronManifest.json with etcd addon and multiple TCP ports
- Create start.sh script with etcd wait and auto-configuration
- Include README.md with comprehensive usage documentation
- Add config.yaml.example for reference configuration
- Add CHANGELOG.md for version tracking
- Add logo.png (Apache APISIX branding)

APISIX is a dynamic, real-time, high-performance API Gateway
that provides rich traffic management features.

Package includes:
- Official Apache APISIX Docker image wrapper (143MB)
- Cloudron etcd addon integration for configuration storage
- Automatic etcd connection wait and configuration
- Multiple exposed ports (9180: Admin API, 9080: HTTP, 9443: HTTPS)
- 1024MB memory limit for gateway operations
- Comprehensive documentation with API usage examples
- Plugin configuration examples

Ports:
- 9180: Admin API port (REST API for configuration)
- 9080: HTTP proxy port (client requests)
- 9443: HTTPS proxy port (client requests with SSL)

Features supported:
- Dynamic configuration without restarts
- Multi-protocol (HTTP/HTTPS, TCP/UDP, Dubbo, MQTT, gRPC, WebSocket)
- Load balancing with multiple strategies
- Security (IP restrictions, JWT, API Key auth)
- Traffic management (rate limiting, circuit breaking, canary releases)
- 100+ plugins for extensibility
- AI Gateway capabilities for LLM workloads

💘 Generated with Crush

Assisted-by: GLM-4.7 via Crush <crush@charm.land>

Package-Workspace/API-Gateway/apisix/CloudronManifest.json

@@ -0,0 +1,41 @@
+{
+  "version": 1,
+  "manifestVersion": 2,
+  "type": "app",
+  "id": "io.cloudron.apisix",
+  "title": "APISIX",
+  "description": "Apache APISIX is a dynamic, real-time, high-performance API Gateway. Provides rich traffic management features like load balancing, dynamic upstream, canary release, circuit breaking, authentication, observability and more.",
+  "author": "Apache APISIX",
+  "website": "https://apisix.apache.org",
+  "contactEmail": "cloudron@tsys.dev",
+  "tagline": "Cloud-native, high-performance API gateway",
+  "version": "3.12-latest",
+  "healthCheckPath": "/apisix/admin/routes",
+  "httpPort": 9180,
+  "memoryLimit": 1024,
+  "addons": {
+    "localstorage": true,
+    "etcd": {
+      "version": "3.4"
+    }
+  },
+  "tcpPorts": {
+    "ADMIN_PORT": {
+      "description": "APISIX Admin API port",
+      "defaultValue": 9180
+    },
+    "HTTP_PORT": {
+      "description": "APISIX HTTP proxy port",
+      "defaultValue": 9080
+    },
+    "HTTPS_PORT": {
+      "description": "APISIX HTTPS proxy port",
+      "defaultValue": 9443
+    }
+  },
+  "mediaLinks": [
+    "https://raw.githubusercontent.com/apache/apisix/master/logos/apache-apisix.png"
+  ],
+  "changelog": "Initial Cloudron package for APISIX API Gateway",
+  "icon": "file://logo.png"
+}