Add macOS configuration files and implement license flavor patching

- Created AppInfo.xcconfig, Debug.xcconfig, Release.xcconfig, and Warnings.xcconfig for macOS Runner target.
- Added entitlements files for DebugProfile and Release configurations to enable app sandboxing.
- Implemented Info.plist for application metadata and MainFlutterWindow.swift for window management.
- Added unit tests in RunnerTests.swift and widget tests in widget_test.dart.
- Updated pubspec.lock and pubspec.yaml to include flutter_lints and updated dependencies.
- Enhanced verify_aot_patch.dart for better AOT patching support and added utility functions.
- Included web assets: favicon, icons, index.html, and manifest.json for web deployment.

Signed-off-by: Tony <tonylu@tony-cloud.com>

.gitignore

@@ -2,8 +2,10 @@
 .gclient
 .gclient_entries
 .gclient_previous_*
+.gcs_entries
 .cipd/
 buildtools/
+engine/
 sdk/
 
 # Root scratch output.