Upgrade to Bevy v0.12 (#12)

* Migrate `System::pipe(...)` calls to `System::map(...)`
* Migrate `EventReader::iter()` and `EventReader::into_iter()` calls to
  `EventReader::read()`
* Migrate asset handling
* Generate `*.meta` files for assets
* Migrate a shader import
* Fix emissive materials double-applying their emissive strength
* Fix non-normalized bone weights resulting in incorrect vertex positions
* Set shadow filtering to `Hardware2x2` to mitigate increase in shader
  compilation times

studio/src/debug.rs

@@ -41,7 +41,7 @@ impl Plugin for DebugPlugin {
 
 fn toggle_debug_mode(mut input: EventReader<InputAction>, mut r_debug: ResMut<DebugMode>) {
     if input
-        .iter()
+        .read()
         .any(|action| matches!(action, InputAction(Lifecycle::Stop, Action::ToggleDebug)))
     {
         **r_debug = !**r_debug;