Add CI workflow

Runs swift build and swift test on macos-14 and macos-15.

Author: xocialize

.github/workflows/ci.yml

@@ -0,0 +1,29 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build-and-test:
+    name: Build & Test (macOS ${{ matrix.os }})
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-14, macos-15]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Show Swift version
+        run: swift --version
+
+      - name: Build
+        run: swift build
+
+      - name: Test
+        run: swift test