Assets and packaging

‍Draft: Verify paths, formats, and asset-loader APIs before adding sample code.

Loading assets

TODO: Explain the public asset-loading interface and default file-system loader.

Reloading assets

TODO: Document supported hot-reload behavior, asset revision tracking, and thread-safety guarantees.

Failure modes

TODO: Cover missing assets, duplicate keys, invalid data, and diagnostics.

See Getting started and Rendering.