chore: add npm script to run the system test

Author: Shesekino

package.json

@@ -6,6 +6,7 @@
     "pretest": "./scripts/build-image.sh",
     "test": "npm run lint && npm run build && npm run test:unit && npm run test:integration",
     "test:unit": "NODE_ENV=test tap test/unit",
+    "test:system": "tap test/system --timeout=600",
     "test:integration": "TEST_PLATFORM=kind CREATE_CLUSTER=true tap test/integration/kubernetes.test.ts --timeout=1200",
     "test:integration:kind": "TEST_PLATFORM=kind CREATE_CLUSTER=true tap test/integration/kubernetes.test.ts --timeout=1200",
     "test:integration:eks": "TEST_PLATFORM=eks CREATE_CLUSTER=false tap test/integration/kubernetes.test.ts --timeout=1200",