Create CI.yml and configure build and test job

.github/workflows/CI.yml

@@ -0,0 +1,25 @@
+# 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: CI-macOS
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+    types: [opened, synchronize]
+
+jobs:
+  build-and-test:
+
+    runs-on: macos-13
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Select Xcode
+      run: xcodes select 15.2
+    - name: Xcode version
+      run: /usr/bin/xcodebuild -version
+    - name: Build and Test
+      run: xcodebuild clean build test -project UnionStreet.xcodeproj -scheme "UnionStreet" CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO -sdk macosx -destination "platform=macOS" ONLY_ACTIVE_ARCH=YES