feat: Enable agents to initiate conversations with connected users and refactor the conversation start flow to be role-aware.

src/components/message/index.ts

@@ -2,3 +2,4 @@
 export { ChatHeader } from './ChatHeader';
 export { MessageInput } from './MessageInput';
 export { MessagingPage } from './MessagingPage';
+export { NewConversationModal } from './NewConversationModal';