Run clippy linter in CI

Author: dtolnay

.github/workflows/ci.yml

@@ -19,3 +19,11 @@ jobs:
         with:
           toolchain: ${{matrix.rust}}
       - run: cargo test
+
+  clippy:
+    name: Clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: dtolnay/rust-toolchain@clippy
+      - run: cargo clippy --tests --benches -- -Dclippy::all -Dclippy::pedantic