Add CI check for Swift (krahets#875)

* Create swift.yml

* Update swift.yml

* Update swift.yml

* Update swift.yml

.github/workflows/swift.yml

@@ -0,0 +1,28 @@
+# This workflow will build a Swift project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-swift
+
+name: Swift
+
+on:
+  push:
+    branches: ["main"]
+    paths: ["codes/swift/**/*.swift"]
+  pull_request:
+    branches: ["main"]
+    paths: ["codes/swift/**/*.swift"]
+
+jobs:
+  build:
+    name: Swift ${{ matrix.swift }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        swift: ["5.9", "5.8.1", "5.7.3"]
+    steps:
+      - uses: swift-actions/setup-swift@v1
+        with:
+          swift-version: ${{ matrix.swift }}
+      - uses: actions/checkout@v4
+      - name: Build
+        run: swift build --package-path codes/swift