ci: add DevSkim test to find oddities in the code

.github/workflows/rust.yml

@@ -96,3 +96,21 @@ jobs:
         with:
           tool: mdbook
       - run: mdbook build book
+
+  DevSkim:
+    name: DevSkim
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run DevSkim scanner
+        uses: microsoft/DevSkim-Action@v1
+
+      - name: Upload DevSkim scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: devskim-results.sarif