SNP-1649 configure git actions to run tests

.github/workflows/unit-tests.yml

@@ -0,0 +1,22 @@
+name: Unit Tests
+
+on: [push]
+
+jobs:
+  test:
+    runs-on: macos-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Set up
+      uses: swift-actions/setup-swift@v2
+      with:
+        swift-version: '5.9'
+
+    - name: Build
+      run: swift build
+
+    - name: Test
+      run: swift test