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/remote_printer/src/lib.rs

@@ -0,0 +1,34 @@
+#[cfg(target_os = "windows")]
+mod setup;
+#[cfg(target_os = "windows")]
+pub use setup::{
+    is_rd_printer_installed,
+    setup::{install_update_printer, uninstall_printer},
+};
+
+#[cfg(target_os = "windows")]
+const RD_DRIVER_INF_PATH: &str = "drivers/RustDeskPrinterDriver/RustDeskPrinterDriver.inf";
+
+#[cfg(target_os = "windows")]
+fn get_printer_name(app_name: &str) -> Vec<u16> {
+    format!("{} Printer", app_name)
+        .encode_utf16()
+        .chain(Some(0))
+        .collect()
+}
+
+#[cfg(target_os = "windows")]
+fn get_driver_name() -> Vec<u16> {
+    "RustDesk v4 Printer Driver"
+        .encode_utf16()
+        .chain(Some(0))
+        .collect()
+}
+
+#[cfg(target_os = "windows")]
+fn get_port_name(app_name: &str) -> Vec<u16> {
+    format!("{} Printer", app_name)
+        .encode_utf16()
+        .chain(Some(0))
+        .collect()
+}