feat(auth): add infra-auth-retriever script for retrieving service authentication

Signed-off-by: zhenyus <zhenyus@mathmast.com>

cluster/bin/infra-auth-retriver

@@ -0,0 +1,47 @@
+#!/bin/sh
+
+set -eu
+
+VERSION="0.0.1-20250115"
+
+help() {
+  echo "Freeleaps Cluster Auth Retriever (Version: ${VERSION})"
+  echo ""
+  echo "FYI: This script is used to retrieve the auth of the infra services, just for internal and temporary use."
+  echo ""
+  echo "Usage: infra-auth-retriver <sub-commands>"
+  echo ""
+  echo "Sub Commands:"
+  echo "  help,-h,--help        Show help"
+  echo "  grafana               Retrieve Grafana Auth"
+  echo "  argocd                Retrieve ArgoCD Auth"
+}
+
+main() {
+  if [ "$#" -ne 1 ]; then
+    echo "[ERROR] No sub-commands provided."
+    echo "[TIP] Use 'infra-auth-retriver help' to get more information."
+    exit 1
+  fi
+
+  sub_command="$1"
+
+  case "${sub_command}" in
+    help|-h|--help)
+      help
+      ;;
+    grafana)
+      echo "Grafana User: $(kubectl get secret kube-prometheus-stack-grafana -n freeleaps-monitoring-system -o jsonpath='{.data.admin-user}' | base64 -d)"
+      echo "Grafana Password: $(kubectl get secret kube-prometheus-stack-grafana -n freeleaps-monitoring-system -o jsonpath='{.data.admin-password}' | base64 -d)"
+      ;;
+    argocd)
+      echo "ArgoCD User: admin"
+      echo "ArgoCD Auth: $(kubectl get secret argocd-initial-admin-secret -n freeleaps-devops-system -o jsonpath='{.data.password}' | base64 -d)"
+      ;;
+    *)
+      help
+      ;;
+  esac
+}
+
+main "$@"