ci: add trufflehog (#594)

.github/workflows/trufflehog.yml

@@ -0,0 +1,21 @@
+name: Scanning for Secrets
+
+run-name: ${{ github.actor }} is scanning for secrets
+on:
+  pull_request:
+
+jobs:
+  TruffleHog:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: TruffleHog OSS
+        uses: trufflesecurity/trufflehog@main
+        with:
+          path: ./
+          base: ${{ github.event.repository.default_branch }}
+          head: HEAD
+          extra_args: --debug