Add cargo-deny Github Actions workflow

Signed-off-by: Andrew Gunnerson <accounts+github@chiller3.com>

.github/workflows/deny.yml

@@ -0,0 +1,17 @@
+---
+name: cargo-deny
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+jobs:
+  check:
+    name: cargo-deny
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Run cargo-deny
+        uses: EmbarkStudios/cargo-deny-action@v1