Upgrade winit in unity-native-plugin-tester

[aosoft]

Background

unity-native-plugin-tester currently depends on winit 0.23.0 and raw-window-handle 0.3.3. winit 0.23.0 no longer compiles on macOS because the bundled cocoa version has a BOOL (i8 → bool) ABI mismatch.

As a workaround in #19, the Windows-only deps (winit, winapi, wio, raw-window-handle) and the window / d3d11 modules have been gated to cfg(windows). The tester therefore builds and runs only on Windows.

Proposal

Upgrade winit (e.g., to 0.30.x) so that the tester can potentially be used on macOS / Linux in the future.

Required changes

• unity-native-plugin-tester/src/window.rs
  • EventLoop::run_return → ApplicationHandler trait–based event handling (or pump_app_events)
  • WindowBuilder::new() → Window::default_attributes() + EventLoop::create_window()
  • EventLoop::<u32>::new_any_thread() API change
• unity-native-plugin-tester/src/d3d11.rs
  • raw-window-handle 0.3 → 0.6: HasRawWindowHandle → HasWindowHandle, return type changes
• unity-native-plugin-tester/Cargo.toml
  • Bump winit and raw-window-handle

Out of scope

• Adding a Metal / Vulkan tester for macOS / Linux (separate task; only relevant once winit is current).