Initial commit: RustDesk 1.4.7 macOS desktop port

- Filled empty libs/hbb_common/ submodule (cloned from rustdesk/hbb_common)
- Patched Flutter 3.44 / Dart 3.12 compatibility:
  * flutter/lib/generated_bridge.dart: asTypedList with cast<>, DartPort=Int64
  * flutter/lib/common.dart: DialogTheme->DialogThemeData, TabBarTheme->TabBarThemeData
  * flutter/pubspec.yaml: extended_text 14.0.0->15.0.2, google_fonts override 5.0.0
  * flutter/macos/Runner/Configs/Release.xcconfig: EXCLUDED_ARCHS=x86_64
- Build verified: cargo check + cargo build --features flutter + cargo build --release --features flutter
- Verified flutter build macos --debug and --release both produce working .app
- Verified .dmg installer (27MB arm64) created via hdiutil
- Build deps: Xcode 26.5, CocoaPods 1.16.2, Flutter 3.44, VCPKG arm64-osx

fastlane/metadata/android/en-US/full_description.txt

@@ -0,0 +1,11 @@
+An open-source remote desktop application, the open source TeamViewer alternative.
+Source code: https://github.com/rustdesk/rustdesk
+Doc: https://rustdesk.com/docs/en/manual/mobile/
+
+In order for a remote device to control your Android device via mouse or touch, you need to allow RustDesk to use the "Accessibility" service, RustDesk uses AccessibilityService API to implement Android remote control.
+
+In addition to remote control, you can also transfer files between Android devices and PCs easily with RustDesk.
+
+You have full control of your data, with no concerns about security. You can use our rendezvous/relay server, or self-hosting, or write your own rendezvous/relay server. Self-hosting server is free and open source: https://github.com/rustdesk/rustdesk-server
+
+Please download and install desktop version from: https://rustdesk.com, then you can access and control your desktop from your mobile, or control your mobile from desktop.

fastlane/metadata/android/en-US/short_description.txt

@@ -0,0 +1 @@
+An open-source remote desktop application, the TeamViewer alternative