Add Linux and macOS execution commands

scripts/validate-terraform.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ENVIRONMENT="${1:-demo}"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+TF_DIR="$REPO_ROOT/terraform/envs/$ENVIRONMENT"
+
+if [[ ! -d "$TF_DIR" ]]; then
+  echo "Terraform environment not found: $TF_DIR" >&2
+  exit 1
+fi
+
+if ! command -v terraform >/dev/null 2>&1; then
+  echo "Terraform is not installed or not in PATH. Install Terraform 1.6+ and rerun this script." >&2
+  exit 1
+fi
+
+cd "$TF_DIR"
+terraform fmt -recursive -check
+terraform init -backend=false
+terraform validate
+