add swiftlint

.github/workflows/swiftlint.yml

@@ -0,0 +1,20 @@
+name: SwiftLint
+
+on:
+  push:
+  pull_request:
+
+  workflow_dispatch:
+
+jobs:
+  swiftlint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v3
+
+      - name: SwiftLint
+        uses: norio-nomura/[email protected]
+        with:
+          args: --strict