feat: add terraform feature to devcontainer configuration

Author: npv2k1

templates-arm/terraform/.devcontainer/devcontainer.json

@@ -8,7 +8,8 @@
     "dockerfile": "Dockerfile"
   },
   "features": {
-    "./local-features/aws-cli": "latest"
+    "./local-features/aws-cli": "latest",
+    "./local-features/terraform": "latest"
     // "ghcr.io/devcontainers/features/common-utils": {},
     // "ghcr.io/devcontainers/features/terraform:1": {},
     // "ghcr.io/devcontainers/features/aws-cli:1": {},