ci(github): add test workflow for automated testing

Author: kdcokenny

.github/workflows/test.yml

@@ -0,0 +1,70 @@
+name: Tests
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'OpenDictation/**'
+      - 'OpenDictationTests/**'
+      - 'Makefile'
+      - '.github/workflows/test.yml'
+      - 'project.yml'
+  pull_request:
+    paths:
+      - 'OpenDictation/**'
+      - 'OpenDictationTests/**'
+      - 'Makefile'
+      - '.github/workflows/test.yml'
+      - 'project.yml'
+
+jobs:
+  test:
+    name: Unit Tests
+    runs-on: macos-26
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Xcode
+        uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: latest-stable
+
+      - name: Install Tools
+        run: brew install xcodegen xcpretty
+
+      - name: Generate Xcode Project
+        run: xcodegen generate
+
+      - name: Download whisper.cpp XCFramework
+        run: |
+          mkdir -p deps/whisper.cpp
+          curl -L -o whisper-xcframework.zip \
+            "https://github.com/ggml-org/whisper.cpp/releases/download/v1.8.2/whisper-v1.8.2-xcframework.zip"
+          unzip -q whisper-xcframework.zip -d deps/whisper.cpp
+          rm whisper-xcframework.zip
+          echo "Downloaded whisper.cpp v1.8.2 xcframework"
+
+      - name: Run Tests
+        run: |
+          set -o pipefail
+          xcodebuild test \
+            -project OpenDictation.xcodeproj \
+            -scheme OpenDictationTests \
+            -destination 'platform=macOS' \
+            CODE_SIGNING_ALLOWED=NO \
+            CODE_SIGNING_REQUIRED=NO \
+            CODE_SIGN_IDENTITY="" \
+            | xcpretty --color --report junit
+
+      - name: Upload Test Results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-results
+          path: build/reports/
+          if-no-files-found: warn
+          retention-days: 7