Add clippy to workflow

Author: SimonErm

.github/workflows/main.yml

@@ -12,6 +12,22 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  run-clippy:
+    runs-on: ubuntu-latest
+    steps:
+      - id: checkout
+        uses: actions/checkout@v4
+      - name: Cache
+        uses: actions/cache@v4
+        with:
+          path: |
+           ~/.cargo/bin/
+           ~/.cargo/registry/index/
+           ~/.cargo/registry/cache/
+           ~/.cargo/git/db/
+           target/
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+      - run: cargo clippy --all-targets --all-features -- -D warnings
   run-tests:
     runs-on: ubuntu-latest
     steps: