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

libs/enigo/Cargo.toml

@@ -0,0 +1,44 @@
+[package]
+name = "enigo"
+version = "0.0.14"
+authors = ["Dustin Bensing <dustin.bensing@googlemail.com>"]
+edition = "2018"
+build = "build.rs"
+
+description = "Enigo lets you control your mouse and keyboard in an abstract way on different operating systems (currently only Linux, macOS, Win – Redox and *BSD planned)"
+documentation = "https://docs.rs/enigo/"
+homepage = "https://github.com/enigo-rs/enigo"
+repository = "https://github.com/enigo-rs/enigo"
+readme = "README.md"
+keywords = ["input", "mouse", "testing", "keyboard", "automation"]
+categories = ["development-tools::testing", "api-bindings", "hardware-support"]
+license = "MIT"
+
+[badges]
+travis-ci = { repository = "enigo-rs/enigo" }
+appveyor = { repository = "pythoneer/enigo-85xiy" }
+
+[dependencies]
+serde = { version = "1.0", optional = true }
+serde_derive = { version = "1.0", optional = true }
+log = "0.4"
+rdev = { git = "https://github.com/rustdesk-org/rdev" }
+tfc = { git = "https://github.com/rustdesk-org/The-Fat-Controller", branch = "history/rebase_upstream_20240722" }
+hbb_common = { path = "../hbb_common" }
+
+[features]
+with_serde = ["serde", "serde_derive"]
+
+[target.'cfg(target_os = "windows")'.dependencies]
+winapi = { version = "0.3", features = ["winuser", "winbase"] }
+
+[target.'cfg(target_os = "macos")'.dependencies]
+core-graphics = "0.22"
+objc = "0.2"
+unicode-segmentation = "1.10"
+
+[target.'cfg(target_os = "linux")'.dependencies]
+libxdo-sys = "0.11"
+
+[build-dependencies]
+pkg-config = "0.3"