Update Swift workflow to include Xcode setup and tests

Author: wibosco

.github/workflows/swift.yml

@@ -0,0 +1,30 @@
+# 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: Build
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: List available Xcode versions
+      run: ls /Applications | grep Xcode
+    - name: Show current version of Xcode
+      run: xcodebuild -version
+    - name: Set up Xcode version
+      run: sudo xcode-select -s /Applications/Xcode_26.2.0.app/Contents/Developer
+    - name: Show current version of Xcode
+      run: xcodebuild -version
+    - name: Install Bundle
+      run: bundle install
+    - name: Run unit tests
+      run: bundle exec fastlane run_unit_tests --verbose