Add DevSkim scanning (#576)

.github/workflows/devskim.yml

@@ -0,0 +1,31 @@
+name: DevSkim
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+  schedule:
+    # set schedule to run at 2AM PT on Saturdays
+    - cron: '0 9 * * Sat'
+
+jobs:
+  lint:
+    name: DevSkim
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Run DevSkim scanner
+        uses: microsoft/DevSkim-Action@v1
+        
+      - name: Upload DevSkim scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v2
+        with:
+          sarif_file: devskim-results.sarif