Delete the obsolete actions.ts (SNOWLUMA_ACTIONS / isSnowLumaAction) and update package SDK top-level exports. index.ts was refactored to reorganize and expose additional helpers and types (createSnowLumaApiError, createEventContext, event/type guards, request/notice helpers, fromCQString, MessageChain, SnowLumaHttpClientOptions, etc.), remove duplicate/unused re-exports, and streamline message/client/error exports for consumers.