Add: checkワークフローを追加

.github/workflows/check.yml

@@ -0,0 +1,21 @@
+name: Run cargo clippy and cargo fmt
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup Rust
+        uses: dtolnay/rust-toolchain@master
+      - name: Run cargo clippy
+        run: cargo clippy --all-targets --all-features -- -D warnings
+      - name: Run cargo fmt
+        run: cargo fmt --all -- --check