Add basic GitHub CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,107 @@
+# This workflow runs CI tests for the main package and Examples package
+name: CI
+
+# Trigger the workflow on push to main, any pull request, or manual dispatch
+on:
+  push:
+    branches:
+      - main
+      - github-ci
+  pull_request:
+    branches:
+      - '*'
+  workflow_dispatch:
+
+# Ensure only one workflow per ref is running at a time
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  macos:
+    name: macOS - ${{ matrix.package }} (Xcode ${{ matrix.xcode }})
+    runs-on: macos-14
+    strategy:
+      matrix:
+        xcode:
+          - '15.4'
+          # - '15.0'
+          - '16.0'
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Select Xcode ${{ matrix.xcode }}
+        run: sudo xcode-select -s /Applications/Xcode_${{ matrix.xcode }}.app
+
+      - name: Print Swift version
+        run: swift --version
+
+      - name: Build package
+        run: swift build
+
+      - name: Run tests
+        run: swift test
+
+  linux:
+    name: Ubuntu - ${{ matrix.package }} (Swift ${{ matrix.swift }})
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        swift:
+          - '6.0'
+          - '5.10'
+          # - '5.9'
+        package:
+          - 'main'
+    container: swift:${{ matrix.swift }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Build package
+        run: swift build
+
+      - name: Run tests
+        run: swift test
+
+  windows:
+    name: Windows - ${{ matrix.package }} (Swift ${{ matrix.swift }})
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        swift:
+          - '6.0'
+          - '5.10'
+          # - '5.9.1' # Macros has been added to Swift on Windows in 5.9.1 version
+        package:
+          - 'main'
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Swift
+        uses: compnerd/gha-setup-swift@main
+        with:
+          branch: swift-${{ matrix.swift }}-release
+          tag: ${{ matrix.swift }}-RELEASE
+
+      - name: Build package
+        run: swift build
+
+      - name: Run tests
+        run: swift test
+
+  check-macro-compatibility:
+    name: Check Macro Compatibility
+    runs-on: macos-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Run Swift Macro Compatibility Check
+        uses: Matejkob/swift-macro-compatibility-check@v1
+        with:
+          run-tests: true
+          major-versions-only: false
+