setup project and example

examples/simple_example.rs

@@ -0,0 +1,8 @@
+use bevy::{pbr::DirectionalLightShadowMap, prelude::*};
+
+fn main() {
+    App::new()
+        .insert_resource(DirectionalLightShadowMap { size: 4096 })
+        .add_plugins(DefaultPlugins)
+        .run();        
+}