Run tests in GH actions

.github/workflows/build.yml

@@ -0,0 +1,53 @@
+name: FreeOTP iOS
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+    name: Build and Test using iPhone simulator
+    runs-on: macos-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install Carthage
+        run: brew install carthage
+        shell: bash
+
+      - name: Run carthage
+        run: carthage update --use-xcframeworks --platform iOS
+        shell: bash
+
+      - name: Set Default Scheme
+        run: |
+          scheme_list=$(xcodebuild -list -json | tr -d "\n")
+          default=$(echo $scheme_list | ruby -e "require 'json'; puts JSON.parse(STDIN.gets)['project']['targets'][0]")
+          echo $default | cat >default
+          echo Using default scheme: $default
+      - name: Build
+        env:
+          scheme: ${{ 'default' }}
+          platform: ${{ 'iOS Simulator' }}
+        run: |
+          # xcrun xctrace returns via stderr, not the expected stdout (see https://developer.apple.com/forums/thread/663959)
+          device=`xcrun xctrace list devices 2>&1 | grep -oE 'iPhone.*?[^\(]+' | head -1 | awk '{$1=$1;print}' | sed -e "s/ Simulator$//"`
+          if [ $scheme = default ]; then scheme=$(cat default); fi
+          if [ "`ls -A | grep -i \\.xcworkspace\$`" ]; then filetype_parameter="workspace" && file_to_build="`ls -A | grep -i \\.xcworkspace\$`"; else filetype_parameter="project" && file_to_build="`ls -A | grep -i \\.xcodeproj\$`"; fi
+          file_to_build=`echo $file_to_build | awk '{$1=$1;print}'`
+          xcodebuild build-for-testing -scheme "$scheme" -"$filetype_parameter" "$file_to_build" -destination "platform=$platform,name=$device"
+      - name: Test
+        env:
+          scheme: ${{ 'default' }}
+          platform: ${{ 'iOS Simulator' }}
+        run: |
+          # xcrun xctrace returns via stderr, not the expected stdout (see https://developer.apple.com/forums/thread/663959)
+          device=`xcrun xctrace list devices 2>&1 | grep -oE 'iPhone.*?[^\(]+' | head -1 | awk '{$1=$1;print}' | sed -e "s/ Simulator$//"`
+          if [ $scheme = default ]; then scheme=$(cat default); fi
+          if [ "`ls -A | grep -i \\.xcworkspace\$`" ]; then filetype_parameter="workspace" && file_to_build="`ls -A | grep -i \\.xcworkspace\$`"; else filetype_parameter="project" && file_to_build="`ls -A | grep -i \\.xcodeproj\$`"; fi
+          file_to_build=`echo $file_to_build | awk '{$1=$1;print}'`
+          xcodebuild test-without-building -scheme "$scheme" -"$filetype_parameter" "$file_to_build" -destination "platform=$platform,name=$device"