Add GCP deployment examples: create Terraform configurations for GCP, including network setup, instance definitions, and routing, along with a README for usage instructions.

examples/gcp/versions.tf

@@ -0,0 +1,14 @@
+terraform {
+  required_version = ">= 1.9"
+
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = ">= 7.0, < 8.0"
+    }
+    http = {
+      source  = "hashicorp/http"
+      version = ">= 3.4, < 4.0"
+    }
+  }
+}