Vendor dependencies for 0.3.0 release

vendor/bevy/examples/app/drag_and_drop.rs

@@ -0,0 +1,16 @@
+//! An example that shows how to handle drag and drop of files in an app.
+
+use bevy::prelude::*;
+
+fn main() {
+    App::new()
+        .add_plugins(DefaultPlugins)
+        .add_systems(Update, file_drag_and_drop_system)
+        .run();
+}
+
+fn file_drag_and_drop_system(mut events: EventReader<FileDragAndDrop>) {
+    for event in events.read() {
+        info!("{:?}", event);
+    }
+}