feat(assistant): optimize MCP and custom widget authoring

packages/api/src/assistant.ts

@@ -1,8 +1,10 @@
 export {
   getAssistantContextEntitiesAsync,
+  getAssistantRequestContextEntitiesAsync,
   getAssistantModelsAsync,
   getSelectedModelDetailsAsync,
   type AssistantContextEntity,
+  type AssistantContextReference,
 } from "./router/assistant";
 export type { OpenRouterGenerationTelemetry } from "./assistant-generation-telemetry";
 export { createAssistantGenerationAccessToken } from "./assistant-generation-access";