feat(api): add chat configuration and conversation message list APIs; update types and integrate into index

src/api/index.ts

@@ -12,3 +12,8 @@ export * from './commodityOrderList';
 export * from './userOrderDetail';
 export * from './createEvent';
 export * from './eventList';
+export * from './recentConversation';
+export * from './conversationMessageList';
+export * from './recommendedQuestionList';
+export * from './chatConfig';
+export * from './modelConfig';