Add pre-commit-config, run pre-commit on all files

platform/src/context.rs

@@ -7,4 +7,4 @@ pub struct PlatformContext {
     pub asset_manager: ModelManagerRef,
     pub frame_width: f32,
     pub frame_height: f32,
-} 
+}

platform/src/event.rs

@@ -4,7 +4,7 @@ pub enum PlatformEvent {
 
     /// The platform has requested to close the app.
     CloseRequested,
-    
+
     /// Platform event loop is about to block and wait for new
     /// new events.
     AboutToWait