CI: Add audit check for `cargo vet`

.github/workflows/audits.yml

@@ -0,0 +1,21 @@
+name: Audits
+
+on:
+  pull_request:
+  push:
+    branches: main
+
+permissions:
+  contents: read
+
+jobs:
+  cargo-vet:
+    name: Vet Rust dependencies
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        id: toolchain
+      - run: rustup override set ${{steps.toolchain.outputs.name}}
+      - run: cargo install cargo-vet --version ~0.9
+      - run: cargo vet --locked