Offload functions to worker threads with shared memory primitives for Node.js.

feat: transfer() for zero-copy ArrayBuffer, TypedArray, stream, and port passing master

Supports all built-in transferable types: ArrayBuffer, MessagePort, ReadableStream, WritableStream, TransformStream, TypedArray, DataView. Extracts the appropriate transferable (e.g. .buffer for TypedArrays) and passes it via the postMessage transfer list. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>