chore: add workflow to run tests

.github/workflows/run_tests.yml

@@ -0,0 +1,25 @@
+name: iOS Unit Tests
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: macos-latest
+    environment: sdds
+    strategy:
+        matrix:
+            scheme: ["SDDSUIKit", "SDDSSwiftUI", "SDDSCore", "SDDSIcons"]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Xcode
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: 'latest'
+
+      - name: Run Unit Tests
+        run: |
+            set -o -pipefail
+            xcodebuild test -workspace SDDS.xcworkspace -scheme ${{ matrix.scheme }} -destination 'platform=iOS Simulator,name=iPhone 13,OS=latest' | xcpretty