fix(lib): migrate to winit 0.30 ApplicationHandler model

winit 0.30.13 removed WindowBuilder and deprecated EventLoop::run. Move
window/GPU creation into ApplicationHandler::resumed, expose AppHandler::setup
hook, switch App::run to run_app, and migrate both examples. pollster becomes a
regular dependency (used by app.rs).

lib/Cargo.toml

@@ -8,10 +8,8 @@ path = "src/lib.rs"
 
 [dependencies]
 wgpu = "30.0.0" # Vérifiez la version la plus récente
-winit = "0.29"  # For window management — pinned to match examples
+winit = "0.30.13"  # For window management — pinned to match examples
 thiserror = "2"
 bytemuck = { version = "1.25.0", features = ["derive"] }
 glam = "0.33"
-
-[dev-dependencies]
-pollster = { version="0.4.0", features = ["macro"] }
+pollster = { version="1.0.1", features = ["macro"] }