Rename "inner size" to "surface size" (#3889)

* Rename `WindowEvent::Resized` to `SurfaceResized`
* Rename `InnerSizeWriter` to `SurfaceSizeWriter`
* Replace `inner_size` with `surface_size`
* Rename `resize_increments` to `surface_resize_increments`

src/platform_impl/web/event_loop/window_target.rs

@@ -556,7 +556,7 @@ impl ActiveEventLoop {
                         canvas.set_old_size(new_size);
                         runner.send_event(Event::WindowEvent {
                             window_id: RootWindowId(id),
-                            event: WindowEvent::Resized(new_size),
+                            event: WindowEvent::SurfaceResized(new_size),
                         });
                         canvas.request_animation_frame();
                     }