Fix build and add some assets

assets/stages/test.stage.ron

@@ -1,84 +0,0 @@
-(
-    id: TestStage,
-    model_path: "stages/battlefield.glb#Scene0",
-    camera: (
-        left: -75.0,
-        right: 75.0,
-        bottom: -30.0,
-        top: 70.0,
-        origin: (0.0, 15.0),
-        vertical_fov_degrees: 30.0,
-        min_depth: 150.0,
-        max_depth: 400.0,
-        subject_scale: 1.0,
-        tracking_smoothness: 3.0,
-        vertical_tilt_degrees: 0.0,
-        horizontal_pan_coefficient: 0.0,
-        vertical_pan_coefficient: 0.0,
-        max_horizontal_pan_degrees: 17.5,
-        max_upward_pan_degrees: 5.0,
-        max_downward_pan_degrees: 7.0,
-        max_downward_expansion: 40.0,
-    ),
-    polygons: [
-        (
-            poly_type: Platform,
-            lines: [
-                (
-                    (x: "-59.5", y: "23.45"),
-                    Floor
-                ),
-                (
-                    (x: "-28.0", y: "23.45"),
-                    Floor
-                )
-            ]
-        ),
-        (
-            poly_type: Platform,
-            lines: [
-                (
-                    (x: "28.0", y: "23.45"),
-                    Floor
-                ),
-                (
-                    (x: "59.5", y: "23.45"),
-                    Floor
-                )
-            ]
-        ),
-        (
-            poly_type: Closed,
-            lines: [
-                (
-                    (x: "-56", y: "-200.0"),
-                    Wall
-                ),
-                (
-                    (x: "-56.0", y: "-3.5"),
-                    Floor,
-                ),
-                (
-                    (x: "-39.2", y: "0.0"),
-                    Floor,
-                ),
-                (
-                    (x: "0.0", y: "0.0"),
-                    Floor
-                ),
-                (
-                    (x: "39.2", y: "0.0"),
-                    Floor
-                ),
-                (
-                    (x: "56.0", y: "-3.5"),
-                    Wall
-                ),
-                (
-                    (x: "56", y: "-200.0"),
-                    Wall
-                ),
-            ]
-        )
-    ]
-)

src/main.rs

@@ -1,7 +1,3 @@
-//! Standalone binary for game-test: `cargo run` plays the game
-//! without the editor. The editor's Play button runs the same
-//! [`game_test::GamePlugin`] through its own game runner instead.
-
 use bevy::asset::AssetMode::Processed;
 use bevy::camera_controller::free_camera::FreeCameraPlugin;
 use bevy::image::{ImageAddressMode, ImagePlugin, ImageSamplerDescriptor};
@@ -30,7 +26,7 @@ fn main() -> AppExit {
     App::new()
         .add_plugins(default_plugins)
         .add_plugins(avian3d::prelude::PhysicsPlugins::default())
-        .add_plugins(game_test::GamePlugin)
+        .add_plugins(shinespark::GamePlugin)
         .add_plugins(FreeCameraPlugin)
         .add_plugins(EguiPlugin::default())
         .add_plugins(WorldInspectorPlugin::default()) // adds default options and `InspectorEguiImpl`s