Drop the salvaged ColorSwatches re-export hunk: main already exports the
component from the SDK, and the plain-JS plugins this slot serves do not need
the props type, so the shared sdk/index.ts hunk stays a single added line.
Docs: TS signature, arbitration (every registration mounts in its own
boundary — no first-wins, plugins cannot suppress each other), teardown
(loader-owned disposer, nothing persisted) and the exact migration for
better-session-appearance (#115961) and hermes-appearance-hub (#116049).
84ac69e884