Add GitHub Actions CI workflow

Author: ivan-magda

.github/workflows/ci.yml

@@ -0,0 +1,59 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  swiftlint:
+    name: SwiftLint
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install or upgrade SwiftLint
+        run: brew install swiftlint || brew upgrade swiftlint
+
+      - name: Run SwiftLint
+        run: swiftlint --strict
+
+  build-and-test:
+    name: ${{ matrix.name }}
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: macOS
+            runner: macos-latest
+          - name: Linux
+            runner: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Swift
+        uses: swift-actions/setup-swift@v2
+        with:
+          swift-version: "6.2"
+
+      - name: Cache SPM dependencies
+        uses: actions/cache@v4
+        with:
+          path: |
+            .build
+            ~/.cache/org.swift.swiftpm
+          key: ${{ runner.os }}-spm-${{ hashFiles('Package.swift', 'Package.resolved') }}
+          restore-keys: |
+            ${{ runner.os }}-spm-
+
+      - name: Build
+        run: swift build
+
+      - name: Run tests
+        run: swift test