add: workflow

.github/workflows/terraform-fmt.yml

@@ -0,0 +1,20 @@
+name: Terraform
+
+on:
+  push:
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Terraform
+        uses: hashicorp/setup-terraform@v3
+        with:
+          terraform_version: 1.9.8
+
+      - name: Terraform fmt
+        run: terraform fmt -check -recursive