feat: add S3 backend and GitHub Actions workflows

sites/bcn01/main.tf

@@ -7,6 +7,14 @@ terraform {
       version = "1.9.0"
     }
   }
+
+  backend "s3" {
+    bucket         = "eqt-terraform-state-629066559706-us-east-1-an"
+    key            = "bcn01/terraform.tfstate"
+    region         = "us-east-1"
+    dynamodb_table = "terraform-locks"
+    encrypt        = true
+  }
 }
 
 provider "meraki" {}