Add terraform scanner

Author: VimukthiPerera

.github/workflows/terraform-scan.yml

@@ -0,0 +1,34 @@
+name: Terraform Security Scan
+
+on:
+  pull_request:
+    paths:
+      - '**/*.tf'
+      - '**/*.tfvars'
+      - '**/*.hcl'
+
+permissions:
+  contents: read
+  security-events: write
+
+jobs:
+  tfsec:
+    name: Run tfsec on PR
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+
+      - name: Run tfsec
+        uses: aquasecurity/tfsec-action@v1.0.3
+        with:
+          format: sarif
+          additional_args: --out tfsec.sarif
+          soft_fail: false
+
+      - name: Upload tfsec SARIF
+        if: always()
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: tfsec.sarif