feat(ecs): added a simple prefab system

examples/prefabs.rs

@@ -0,0 +1,52 @@
+use comet::prelude::*;
+
+fn setup(app: &mut App, renderer: &mut Renderer2D) {
+    // Initialize the texture atlas
+    renderer.initialize_atlas();
+
+    // Register components
+    app.register_component::<Position2D>();
+    app.register_component::<Color>();
+
+    // Register prefabs
+    register_prefab!(
+        app,
+        "player",
+        Position2D::from_vec(v2::new(0.0, 0.0)),
+        Color::new(0.0, 1.0, 0.0, 1.0) // Green player
+    );
+
+    register_prefab!(
+        app,
+        "enemy",
+        Position2D::from_vec(v2::new(5.0, 5.0)),
+        Color::new(1.0, 0.0, 0.0, 1.0) // Red enemy
+    );
+
+    register_prefab!(
+        app,
+        "pickup",
+        Position2D::from_vec(v2::new(-5.0, -5.0)),
+        Color::new(1.0, 1.0, 0.0, 1.0) // Yellow pickup
+    );
+
+    if let Some(player_id) = app.spawn_prefab("player") {
+        debug!("Spawned player with ID: {}", player_id);
+    }
+
+    if let Some(enemy_id) = app.spawn_prefab("enemy") {
+        debug!("Spawned enemy with ID: {}", enemy_id);
+    }
+
+    if let Some(pickup_id) = app.spawn_prefab("pickup") {
+        debug!("Spawned pickup with ID: {}", pickup_id);
+    }
+}
+
+fn update(app: &mut App, renderer: &mut Renderer2D, dt: f32) {}
+
+fn main() {
+    App::new()
+        .with_title("Prefabs Example")
+        .run::<Renderer2D>(setup, update);
+}