actions: add reviewdog

.github/workflows/reviewdog.yml

@@ -0,0 +1,16 @@
+name: reviewdog / clippy
+on: pull_request
+jobs:
+  clippy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install clippy
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+      - uses: Swatinem/rust-cache@v2
+
+      - uses: sksat/action-clippy@main
+        with:
+          reporter: github-pr-review