feat: enemies now rotate with movement

modules/wave_survival/enemy_body.cpp

@@ -13,6 +13,9 @@ void EnemyBody::physics_process(double delta) {
 	GETSET(velocity, {
 		velocity = Vector3{ this->movement_direction.x, velocity.y, this->movement_direction.y };
 	});
+	if (!get_velocity().is_zero_approx()) {
+		look_at(get_global_position() + get_velocity());
+	}
 	move_and_slide();
 }