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/.dockerignore

@@ -0,0 +1,11 @@
+# Ignore typical build context clutter
+.git
+.gitignore
+node_modules
+npm-debug.log
+*.log
+dist
+build
+Dockerfile.*
+.DS_Store
+