add workflow for scanning

.github/workflows/secret-scan.yaml

@@ -0,0 +1,19 @@
+name: secret-scan
+on:
+  pull_request:
+  push:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 13 * * *" # run once a day at 13:00 UTC
+jobs:
+  scan:
+    name: gitleaks
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: gitleaks/gitleaks-action@v2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITLEAKS_LICENSE: ${{ secrets.GITLEAKS_LICENSE}} # Only required for Organizations, not personal accounts.