Add macOS runner test workflow

.gitea/workflows/test-macos.yaml

@@ -0,0 +1,25 @@
+name: Test macOS Runner
+on: [push]
+
+jobs:
+  test-macos:
+    runs-on: macos
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: System Info
+        run: |
+          echo "=== macOS Version ==="
+          sw_vers
+          echo ""
+          echo "=== Xcode Version ==="
+          xcodebuild -version
+          echo ""
+          echo "=== Swift Version ==="
+          swift --version
+          echo ""
+          echo "=== Available SDKs ==="
+          xcodebuild -showsdks
+          echo ""
+          echo "=== Runner Success ==="
+          echo "Mac Mini runner is working!"