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/t/certs/server_1024.key

@@ -0,0 +1,16 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----