add trufflehog secret scan CI (#63)

.github/workflows/secret_scan.yml

@@ -0,0 +1,24 @@
+name: Secrets Scan
+on:
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  trufflehog:
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Checkout Source
+        uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5
+        with:
+          fetch-depth: "0"
+      - name: TruffleHog OSS
+        uses: trufflesecurity/trufflehog@8b6f55b592e46ac44a42dc3e3dee0ebcc0f56df5
+        with:
+          path: ./
+          base: ${{ github.event.pull_request.base.sha }}
+          head: ${{ github.event.pull_request.head.sha }}