Replace EventLoop::run with EventLoop::spawn (#73)

spawn event loop instead of using js exception control flow hack

essentially removes this, but now you have to remember to return control
flow to the browser because single threading async stuff (e.g. dont do
blocking stuff without using workers)

![image](https://github.com/Inochi2D/inox2d/assets/46694241/f7ba12cb-04a7-48b0-9d17-878ad98c0454)

examples/render-webgl/src/main.rs

@@ -52,6 +52,7 @@ async fn run() -> Result<(), Box<dyn std::error::Error>> {
 	use wasm_bindgen::prelude::Closure;
 	use wasm_bindgen::JsCast;
 	use winit::event::{Event, WindowEvent};
+	use winit::platform::web::EventLoopExtWebSys;
 
 	use crate::scene::WasmSceneController;
 
@@ -134,7 +135,7 @@ async fn run() -> Result<(), Box<dyn std::error::Error>> {
 	}
 
 	// Event loop
-	events.run(move |event, elwt| {
+	events.spawn(move |event, elwt| {
 		// it needs to be present
 		let _window = &window;
 		elwt.set_control_flow(winit::event_loop::ControlFlow::Wait);
@@ -156,7 +157,8 @@ async fn run() -> Result<(), Box<dyn std::error::Error>> {
 			}
 			_ => (),
 		}
-	})?;
+	});
+
 	Ok(())
 }