Editor project contracts

Project manifests, adapter surfaces, authoring contracts and settings schemas for Volter Editor. This package declares the contract; it does not import an editor host, SDK or game runtime implementation.

Adapter editor-default data types live beside their schema under src/adapter/editor-looks.ts and workspace-arrangement.ts. The extension SDK exposes those same types to contribution authors, without a dependency back from this package into the SDK.

Product-specific execution handles belong in product-owned extensions of the host contexts. These shared contexts do not expose the old concrete Game. Existing native Three/Pixi surface types remain explicit; this migration does not claim that the contracts are renderer-neutral.

Run npm run typecheck -w @volter/editor-project through the active World. There are no compiler aliases into another checkout. See the root WORK.md for remaining migration and release gates. This package is private during migration.