feat(rathole,apisix): complete Rathole and APISIX Cloudron packages

- Fix Rathole download URL to use .zip format instead of .tar.gz
- Complete APISIX package using official apache/apisix:3.8.0-debian base image
- Add cloudron user creation for APISIX compatibility
- Both packages build successfully and follow KNELCloudron- naming convention
- Rathole: reverse proxy tunnel with proper binary download
- APISIX: API gateway with official Docker image base

CloudronPackages/APISIX/CloudronManifest.json

@@ -0,0 +1,19 @@
+{
+  "manifestVersion": 2,
+  "id": "io.knel.apisix",
+  "title": "Apache APISIX",
+  "author": "KNEL",
+  "description": "Apache APISIX API Gateway for microservices and API management",
+  "website": "https://apisix.apache.org",
+  "contactEmail": "admin@knownelement.com",
+  "version": "3.8.0",
+  "changelog": "Initial Cloudron package for Apache APISIX API Gateway",
+  "healthCheckPath": "/apisix/admin/routes",
+  "httpPort": 9180,
+  "addons": {
+    "localstorage": {}
+  },
+  "tags": ["api", "gateway", "microservices", "proxy"],
+  "icon": "logo.png"
+}
+