Introduces `BaseGameClient` to allow external environments (like C#)
to interact with the game engine. It provides mechanisms for:
- Reactive state selection via `select`
- Async event interception via `use`
- Lifecycle management and status tracking
- Interruption handling for async game loops
Updated `middleware.ts` to allow unregistering middleware via the
returned function from `use`.
hypercross
20993d3b72