chore(ci): add cargo deny workflow

.github/workflows/deny.yml

@@ -0,0 +1,26 @@
+name: deny
+
+on:
+  push:
+    branches: [master]
+    paths: [Cargo.lock]
+  pull_request:
+    branches: [master]
+    paths: [Cargo.lock]
+  merge_group:
+
+env:
+  RUSTFLAGS: -D warnings
+  CARGO_TERM_COLOR: always
+
+concurrency: deny-${{ github.head_ref || github.run_id }}
+
+jobs:
+  deny:
+    name: deny
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: EmbarkStudios/cargo-deny-action@v1
+        with:
+          command: check all