feat: Functionally working stairs without sprite

- Made all observers public
- Observe all InteractionEvents in the app, not in the entity
- Added names to layout bundles
- Raised player speed to 4 m/s for quicker debugging
- Added second container on 2nd floor

src/layout/container.rs

@@ -20,7 +20,7 @@ const CRATE_CLOSED_ASSET: &'static str = "sprites/interactive/crate_closed.png";
 #[require(Sprite, InteractiveObject, Inventory)]
 pub struct Container;
 
-fn on_container_interact(
+pub fn on_container_interact(
     event: On<InteractionEvent>,
     mut commands: Commands,
     locked_query: Query<(), With<Locked>>,
@@ -42,7 +42,7 @@ pub fn container_bundle(
     asset_server: &Res<AssetServer>,
     position: Vec2,
     inventory_size: UVec2,
-    items: Vec<Item>
+    items: Vec<Item>,
 ) -> impl Bundle {
     let image = asset_server.load(CRATE_CLOSED_ASSET);
     (
@@ -50,7 +50,6 @@ pub fn container_bundle(
         Transform::from_xyz(position.x, position.y - meters(0.5), 0.),
         Sprite::from_image(image),
         Inventory::new(inventory_size),
-        Observer::new(on_container_interact),
         Children::spawn((
             SpawnIter(items.into_iter()),
             Spawn((
@@ -59,5 +58,6 @@ pub fn container_bundle(
                 Transform::from_xyz(0., meters(0.5), 0.),
             )),
         )),
+        Name::new(format!("Container {}x{}", inventory_size.x, inventory_size.y)),
     )
 }