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/.devcontainer/devcontainer.json

@@ -0,0 +1,14 @@
+{
+  "name": "APISIX",
+  "dockerComposeFile": ["docker-compose.yml"],
+  "service": "apisix",
+  "workspaceFolder": "/workspace",
+  "privileged": true,
+  "postCreateCommand": "bash -c 'cd /workspace && rm -rf test-nginx && git config --global --add safe.directory /workspace && git submodule update --init --recursive && git clone https://github.com/openresty/test-nginx.git --depth 1 --single-branch -b master && make deps'",
+  "customizations": {
+    "vscode": {
+      "extensions": ["ms-vscode.makefile-tools", "ms-azuretools.vscode-docker", "sumneko.lua"]
+    }
+  },
+  "forwardPorts": [9080, 9180, 2379]
+}