fix(catalog): add gcloud_installer.sh for Google Cloud CLI

The install_method must match an existing installer script. Create
gcloud_installer.sh following the aws_installer.sh pattern: fresh
installs via sdk.cloud.google.com, updates via gcloud components update.

Signed-off-by: Sebastian Mendel <sebastian.mendel@netresearch.de>
Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>

Author: CybotTM

catalog/gcloud.json

@@ -1,7 +1,7 @@
 {
   "name": "gcloud",
   "category": "platform",
-  "install_method": "manual",
+  "install_method": "gcloud_installer",
   "description": "Google Cloud CLI for managing Google Cloud resources",
   "homepage": "https://cloud.google.com/sdk/gcloud",
   "binary_name": "gcloud",

scripts/installers/gcloud_installer.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# Google Cloud CLI installer
+set -euo pipefail
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+. "$DIR/lib/install_strategy.sh"
+
+TOOL="${1:-gcloud}"
+CATALOG_FILE="$DIR/../catalog/$TOOL.json"
+
+if [ ! -f "$CATALOG_FILE" ]; then
+  echo "Error: Catalog file not found: $CATALOG_FILE" >&2
+  exit 1
+fi
+
+BINARY_NAME="$(jq -r '.binary_name' "$CATALOG_FILE")"
+
+# Get current version
+before="$(command -v "$BINARY_NAME" >/dev/null 2>&1 && "$BINARY_NAME" version 2>/dev/null | head -1 || true)"
+
+if command -v "$BINARY_NAME" >/dev/null 2>&1; then
+  # Already installed - use built-in update
+  "$BINARY_NAME" components update --quiet 2>&1 || true
+else
+  # Fresh install via Google Cloud SDK installer
+  TMP="$(mktemp -d)"
+  cd "$TMP"
+  curl -fsSL https://sdk.cloud.google.com -o install.sh
+  bash install.sh --disable-prompts --install-dir="$HOME" 2>&1
+  cd - >/dev/null
+  rm -rf "$TMP"
+
+  # Add to PATH if not already present
+  GCLOUD_BIN="$HOME/google-cloud-sdk/bin"
+  if [ -d "$GCLOUD_BIN" ] && ! command -v "$BINARY_NAME" >/dev/null 2>&1; then
+    export PATH="$GCLOUD_BIN:$PATH"
+  fi
+fi
+
+# Report
+after="$(command -v "$BINARY_NAME" >/dev/null 2>&1 && "$BINARY_NAME" version 2>/dev/null | head -1 || true)"
+path="$(command -v "$BINARY_NAME" 2>/dev/null || true)"
+printf "[%s] before: %s\n" "$TOOL" "${before:-<none>}"
+printf "[%s] after:  %s\n" "$TOOL" "${after:-<none>}"
+if [ -n "$path" ]; then printf "[%s] path:   %s\n" "$TOOL" "$path"; fi
+
+# Refresh snapshot after successful installation
+refresh_snapshot "$TOOL"