feat: add secret scanner workflow

.github/workflows/secret-scanner.yaml

@@ -0,0 +1,14 @@
+on: 
+  pull_request:
+    types: [synchronize]
+  push:
+    branches:
+      - main
+name: Secret Scanner (go/secret-scanner)
+jobs:
+  scan_secret:
+    name: Scan incoming changes
+    runs-on: ubuntu-latest
+    steps: 
+      - name: Run scanner
+        uses: aristanetworks/secret-scanner-service-public@main