Attempting to do CI to run unit tests on all PRs.

.github/workflows/pull-request-ci.yml

@@ -0,0 +1,62 @@
+name: Pull Request CI
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: pull-request-ci-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  unit-tests:
+    name: Unit Tests (${{ matrix.scheme }})
+    runs-on: macos-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        scheme:
+          - libPhoneNumber
+          - libPhoneNumberGeocoding
+          - libPhoneNumberShortNumber
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Run unit tests
+        env:
+          SCHEME: ${{ matrix.scheme }}
+        run: |
+          set -eo pipefail
+
+          xcodebuild \
+            -project libPhoneNumber.xcodeproj \
+            -scheme "$SCHEME" \
+            -destination 'platform=iOS Simulator,OS=latest,name=iPhone 17' \
+            CODE_SIGNING_ALLOWED=NO \
+            test
+
+  podspec-lint:
+    name: Podspec Lint (${{ matrix.podspec }})
+    runs-on: macos-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        podspec:
+          - libPhoneNumber-iOS.podspec
+          - libPhoneNumberGeocoding.podspec
+          - libPhoneNumberShortNumber.podspec
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Ensure CocoaPods is installed
+        run: |
+          if ! command -v pod >/dev/null; then
+            gem install cocoapods
+          fi
+
+      - name: Lint podspec
+        run: pod lib lint "${{ matrix.podspec }}" --verbose