Introduce support for generator functions in leaf tasks, allowing
them to yield for multi-frame execution. The `TaskRunner` now accepts
a delta time (`dt`) parameter, which is passed through to leaf
handlers.
Additionally, a `Cancel` symbol is introduced to allow leaf tasks to
explicitly cancel their subtree via a thrown error.
Introduce `buildTree` to allow defining behaviour trees using a
declarative `TreeDef` object instead of manual entity spawning and
relationship wiring. This simplifies tree construction and manages
leaf handlers internally.
Introduces a `TaskRunner` for executing behavior trees within the
ECS world. Supports leaf, sequential, parallel, and random task
kinds, along with status propagation (succeeded, failed, cancelled).
hypercross