Enable secrets scanning with TruffleHog in CI (#743)

Author: trivikr

.github/workflows/scan.yml

@@ -0,0 +1,17 @@
+name: scan
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  scan:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: trufflesecurity/trufflehog@main
+        with:
+          path: ./
+          base: ${{ github.event.repository.default_branch }}